Raw hides and skins of sheep or lambs

1. Scope and Applicability

This PCR covers untanned fresh or first-stage preserved sheep/lamb raw skins at the actual removal or hide-curing handover. Declare adult/lamb class, fleece attachment, source legality, grade, preservation state, moisture and adhering salt, net mass and gate. Fleece still attached is part of the skin; detached wool is another product. Exclude goat skin, tanned fleece-on sheepskin, manufactured leather, further preparation and post-gate freight. Lawfully recovered, quality-acceptable fallen animals may yield skin without fictional meat co-products.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.agriculture-forestry-and-fishery-products.live-animals-and-animal-products-excluding-meat.raw-hides-and-skins-of-sheep-or-lambs
classification_refs	CPC 3.0 02953
covered_products	Fresh or first-stage preserved untanned sheep/lamb raw skins, fleece potentially attached.
excluded_products	Detached wool, goat skins, tanned fleece-on sheepskins, leather and further prepared goods.
representative_product	Accepted raw skin weighed as sold at actual handover.
production_route	Actual husbandry and slaughter or lawful fallen recovery; independent flaying, first conditioning, grading, optional preservation and handover.
market_state	Untanned raw skin with age, fleece, grade and condition declared.

3. Reference Flow

Field	Value
What	Accepted untanned sheep/lamb skin at actual gate.
How much	1 kg net as-sold skin excluding package and free salt/brine.
How well	Record age, source legality, fleece, grade, preservation, moisture/salt and gate.
How long or cycle	Attribute once by animal cohort, slaughter/recovery event and service period.
reference_flow_link	raw_skin_product

Field	Value
Reference amount	1
Reference product flow	Condition- and gate-qualified sheep/lamb raw skin
Reference flow property	Mass 93a60a56-a3c8-11da-a746-0800200b9a66
Reference unit group	Mass units 93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	adult or lamb; slaughter or lawful fallen recovery; fleece; grade; preserved state; moisture/salt; net mass; gate; period

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
m_net	relevant lots	Mass	kg	Record calibrated gross/tare; exclude package and separable free salt/brine from net skin.
m_state	relevant lots	Mass, moisture and salt fractions	kg; kg/kg	Convert fresh and preserved states only using lot-measured mass, moisture and salt; no universal factor.
m_balance	relevant lots	Mass	kg	Reconcile accepted, downgraded, rejected, trim and moisture loss by source lot.
m_period	relevant lots	Time and service measure	period; service unit	Link animal phases, output events and shared service to actual periods without duplicate burden.
inventory_reference_normalization	all inventory rows	Actual flow property	exchange unit per reference flow	The inventory and collection aggregation fields below express final amounts per declared reference flow. Keep all raw collection records, original denominator qualifiers, route/period strata, unit conversions and allocation requirements. For each flow, first obtain its attributable amount in its own numerator unit using the existing rules; then divide by the measured accepted reference-output quantity of the same scope and multiply by the declared reference quantity. Do not mix species, states, gates or incompatible routes; count transfers and shared burdens once. A missing, zero or untraceable accepted-output denominator is a blocking data-quality issue. Keep provisional QA ranges on their explicitly stated bases; they are not conversion factors or production defaults. These are final foreground-package contributions, not replacements for stage quantitative references or stage-native unit-process datasets. Retain stage records separately. Compute normalized amount = attributable raw amount * declared reference quantity / measured accepted final reference-output quantity. Apply normalization exactly once.
stage_throughput_linkage	stage records and final package contributions	Actual flow property and its stated raw basis	retain native numerator and stage denominator units	Keep the original lot, event, cohort, period and stage denominators with their units. Reconstruct the attributable numerator A with measured stage quantity Q_stage and documented attribution before final normalization. If a quoted amount a_B corresponds to an explicit stage basis B_stage (for example, 1000 kg), use A = a_B * Q_stage / B_stage. If r_stage is already an intensity in exchange-unit per stage-unit, instead use A = r_stage * Q_stage, with no second division by B_stage. A raw attributable total is used directly. Final contribution = A * declared reference quantity / measured accepted final output. Convert compatible units explicitly and apply each attribution/allocation share exactly once; never treat a quoted amount or intensity as a raw total. Link stage transfers, losses, rejects, stocks, shared services and allocation to the same actual route, period and final-output stratum. For a 1000 kg basis retain 1000 kg explicitly. Do not assume unit yield, equal fresh/dried mass, equal head mass, equal dose quality or interchangeable gates. Missing links, unsupported unit conversion, zero denominators and untraceable allocation block dataset production. Stage-native datasets retain their own stage reference; package contributions are a separate projection.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Traceable cohort and actual slaughter, or lawful fallen-animal recovery event.
starting_condition_role	Prefer compatible upstream husbandry through live-animal arrival with actual slaughter/dressing foreground here. If an upstream dataset already includes slaughter, the source node is only a traceable interface/allocation record and repeats no slaughter exchanges. Fallen-animal recovery starts from documented lawful source and separately accounts for its actual terminal treatment. Purchased materials/services are Product inputs only where used.
product_classification_scope	Fresh or first-stage preserved, not further prepared sheep/lamb raw skin.
recursive_input_rule	Purchased same-category raw skin retains upstream burden, not recounted as newly flayed.
upstream_dataset_requirement	Traceable husbandry, slaughter or recovery and actual material/service data; no automatic zero-burden hide.
disclosure	Age, fleece, source legality, state, grade, gate, periods, allocation and shared services.

Boundary Rules

rule_id	Applies to	Rule	source_ids
b_source	animal source	Include traceable husbandry and actual slaughter/dressing, including real meat, detached wool and milk at distinct phases; do not duplicate slaughter exchanges already covered by an upstream dataset. Lawful fallen-animal recovery follows actual terminal-treatment route, not fictional meat. Only a quality-accepted recovered skin-bearing material exits the source interface as Product; nonaccepted recovered carcass material follows its actual waste/treatment path, not the Product card.	fao-hides-statistics;fao-hides-skins
b_remove	removal	Independent flaying hands intact untanned skin to first preparation; separate incidental tissue and damage.	fao-small-ruminant-slaughter
b_condition	first handling	Include actual cleaning, fleshing and trimming before sorting; exclude dehairing, liming and tanning.	fao-small-ruminant-slaughter
b_preserve	preserved lots	Fresh lots bypass treatment. For preserved lots measure method, energy, salt/brine, before/after state and residues without universal recipe.	fao-hides-skins
b_gate	handover	Protect raw skin to actual removal-site or curing handover; exclude tannery transformation and downstream transport.	un-cpc-3-notes;unido-leather-framework

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
source	Animal source, slaughter or lawful recovery	required	relevant lots	Actual upstream animal and co-product interface; fallen route uses lawful recovery without fictional meat.	kg source event
remove	Independent raw skin removal	required	relevant lots	Separate flaying from source event and first preparation.	kg node output
condition	First raw-skin conditioning	required	relevant lots	Clean, flesh and trim only as performed before grading.	kg node output
grade	Raw-skin grading and sorting	required	relevant lots	Separate accepted, downgraded sale and rejected destinations.	kg node output
preserve	Optional raw-skin preservation	conditional	preserved lots only	Stabilize by actual chilling, drying, salt or brine method; fresh lots bypass.	kg node output
handover	Protective presentation and handover	required	relevant lots	Protect accepted raw skin to declared removal or curing gate.	kg node output

Husbandry may span breeding, lactation, shearing and finishing periods. Real saleable co-products are attributed by their own period and gate; attached fleece cannot also be detached wool. Flaying is independent of source and first conditioning. Grading separates accepted, saleable downgrade and reject destinations. Fresh lots bypass preservation. Shared slaughter floor, flaying bench, cleaning, cold room and curing assets are charged once to actual nodes and periods.

Process: Animal source, slaughter or lawful recovery (source)

Inputs

Product flows

Traceable sheep or lamb (source_animal)

Only slaughter route; trace prior breeding, wool and milk periods and supplier burden.

Denominator and scope requirements：per kg node output

Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

• Selected flow: Live sheep or lamb received for actual slaughter (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_source
• Range: Lot completeness screen, not a default factor
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 100000
  • Unit: kg/kg
  • Basis: per kg node output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Elementary flows

Outputs

Product flows

Skin-bearing sheep/lamb material (source_skinbearing)

From actual slaughter or lawful fallen-animal recovery only after quality acceptance as a raw-skin source. Rejected recovered carcass remains in the separately documented waste/treatment route; do not invent meat on fallen route.

Denominator and scope requirements：per kg node output

Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

• Selected flow: Sheep/lamb carcass or portion with raw skin attached (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_source
• Range: Lot completeness screen, not a default factor
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 100000
  • Unit: kg/kg
  • Basis: per kg node output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Raw sheep milk at its independent phase handover (source_raw_sheep_milk_product)

Conditional on this exact material being independently intended and actually handed over inside the existing process boundary. Record actual species/material, physical form, grade, moisture/composition where relevant, lot, recipient, quantity and gate. A named example does not establish actual production or a default recipe. Keep each physical lot and destination separate; do not count an internal transfer or a selected reference-output lot again as a co-product. For a genuinely mixed screenings/offcut stream, retain measured physical composition rather than inventing separation or also counting its components.

Collection and handover scope: Record only existing outputs at their own phase and gate; attached fleece is not detached wool. Denominator and scope requirements：per kg node output Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

• Selected flow: Raw sheep milk at its independent phase handover
• Flow property / unit: Mass / kg
• Amount rule: Measure the mass of this specific product at its unique actual handover; retain the original process/lot/period basis and use the existing throughput-linkage and normalization rules exactly once. Keep the unallocated physical quantity ledger separate from Section 7 shared-burden allocation.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_source

No numerical range is transferred from the retired collection card. Use compatible measured quantities and identity-specific evidence; missing evidence remains a completeness gap, not zero. The UUID remains unresolved until a compatible exact identity is confirmed.

Detached sheep wool at its independent phase handover (source_detached_sheep_wool_product)

Conditional on this exact material being independently intended and actually handed over inside the existing process boundary. Record actual species/material, physical form, grade, moisture/composition where relevant, lot, recipient, quantity and gate. A named example does not establish actual production or a default recipe. Keep each physical lot and destination separate; do not count an internal transfer or a selected reference-output lot again as a co-product. For a genuinely mixed screenings/offcut stream, retain measured physical composition rather than inventing separation or also counting its components.

Collection and handover scope: Record only existing outputs at their own phase and gate; attached fleece is not detached wool. Denominator and scope requirements：per kg node output Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

• Selected flow: Detached sheep wool at its independent phase handover
• Flow property / unit: Mass / kg
• Amount rule: Measure the mass of this specific product at its unique actual handover; retain the original process/lot/period basis and use the existing throughput-linkage and normalization rules exactly once. Keep the unallocated physical quantity ledger separate from Section 7 shared-burden allocation.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_source

No numerical range is transferred from the retired collection card. Use compatible measured quantities and identity-specific evidence; missing evidence remains a completeness gap, not zero. The UUID remains unresolved until a compatible exact identity is confirmed.

Separately removed raw sheep meat at its actual source handover (source_separate_sheep_meat_product)

Conditional on this exact material being independently intended and actually handed over inside the existing process boundary. Record actual species/material, physical form, grade, moisture/composition where relevant, lot, recipient, quantity and gate. A named example does not establish actual production or a default recipe. Keep each physical lot and destination separate; do not count an internal transfer or a selected reference-output lot again as a co-product. For a genuinely mixed screenings/offcut stream, retain measured physical composition rather than inventing separation or also counting its components.

Collection and handover scope: Record only existing outputs at their own phase and gate; attached fleece is not detached wool. Denominator and scope requirements：per kg node output Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

Only meat already physically separated and independently handed over at this source event belongs here. Meat still contained in source_skinbearing is part of that transfer, not an additional source output. If meat separates at a later responsible node, identify it there through matched records instead of reporting it twice; never invent meat on the fallen-animal route.

• Selected flow: Separately removed raw sheep meat at its actual source handover
• Flow property / unit: Mass / kg
• Amount rule: Measure the mass of this specific product at its unique actual handover; retain the original process/lot/period basis and use the existing throughput-linkage and normalization rules exactly once. Keep the unallocated physical quantity ledger separate from Section 7 shared-burden allocation.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_source

No numerical range is transferred from the retired collection card. Use compatible measured quantities and identity-specific evidence; missing evidence remains a completeness gap, not zero. The UUID remains unresolved until a compatible exact identity is confirmed.

Waste flows

Elementary flows

Process: Independent raw skin removal (remove)

Inputs

Product flows

Skin-bearing material for flaying (remove_input)

Transfer from source once; flaying is independent of animal production and first cleaning.

Denominator and scope requirements：per kg node output

Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

• Selected flow: Skin-bearing sheep/lamb carcass or portion (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_remove
• Range: Lot completeness screen, not a default factor
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 100000
  • Unit: kg/kg
  • Basis: per kg node output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Elementary flows

Outputs

Product flows

Fresh raw skin after flaying (remove_skin)

Measure adult/lamb class, intactness and fleece-on status.

Denominator and scope requirements：per kg node output

Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

• Selected flow: Untanned sheep/lamb raw skin immediately after removal (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_remove
• Range: Lot completeness screen, not a default factor
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 1
  • Upper: 1
  • Unit: kg/kg
  • Basis: per kg node output
  • Basis kind: Process output (process_output)
  • Evidence kind: Collected record (collected_record)

Waste flows

Flaying damage and incidental tissue (remove_residue)

Separate intended skin from loss, tissue and damaged rejected skin.

Denominator and scope requirements：per kg node output

Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

• Selected flow: Nonsaleable flaying residue by actual destination (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_residues
• Range: Lot completeness screen, not a default factor
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 100000
  • Unit: kg/kg
  • Basis: per kg node output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Elementary flows

Process: First raw-skin conditioning (condition)

Inputs

Product flows

Fresh skin entering first preparation (condition_in)

Match removal ticket and retain lot/fleece identity.

Denominator and scope requirements：per kg node output

Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

• Selected flow: Fresh untanned sheep/lamb skin (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_condition
• Range: Lot completeness screen, not a default factor
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 100000
  • Unit: kg/kg
  • Basis: per kg node output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

First cleaning water (condition_water)

Use only when actual cleaning is performed; meter by node and period.

Denominator and scope requirements：per kg node output

Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

• Selected flow: Supplied process water (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_utilities
• Range: Lot completeness screen, not a default factor
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 100000
  • Unit: kg/kg
  • Basis: per kg node output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Elementary flows

Outputs

Product flows

Prepared still-raw skin (condition_out)

Hand to grading after actual cleaning, fleshing or trim; no dehairing or tanning.

Denominator and scope requirements：per kg node output

Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

• Selected flow: First-conditioned untanned sheep/lamb skin (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_condition
• Range: Lot completeness screen, not a default factor
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 1
  • Upper: 1
  • Unit: kg/kg
  • Basis: per kg node output
  • Basis kind: Process output (process_output)
  • Evidence kind: Collected record (collected_record)

Waste flows

First-preparation residue (condition_residue)

Identify separately marketed material, waste and measured loss.

Denominator and scope requirements：per kg node output

Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

• Selected flow: Tissue and nonsaleable trim by destination (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_residues
• Range: Lot completeness screen, not a default factor
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 100000
  • Unit: kg/kg
  • Basis: per kg node output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Elementary flows

Process: Raw-skin grading and sorting (grade)

Inputs

Product flows

Prepared skin for grading (grade_in)

Inspect age, fleece, defects and buyer criteria.

Denominator and scope requirements：per kg node output

Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

• Selected flow: First-conditioned sheep/lamb raw skin (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_grade
• Range: Lot completeness screen, not a default factor
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 1
  • Upper: 1
  • Unit: kg/kg
  • Basis: per kg node output
  • Basis kind: Process output (process_output)
  • Evidence kind: Collected record (collected_record)

Waste flows

Elementary flows

Outputs

Product flows

Accepted and downgraded sale grades (grade_sale)

Name every saleable grade and handover; downgraded sale product is not waste.

Denominator and scope requirements：per kg node output

Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

• Selected flow: Raw sheep/lamb skin by actual marketable grade (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_grade
• Range: Lot completeness screen, not a default factor
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 100000
  • Unit: kg/kg
  • Basis: per kg node output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Rejected raw skin (grade_reject)

Record actual treatment destination, distinct from marketable downgrade.

Denominator and scope requirements：per kg node output

Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

• Selected flow: Unsaleable rejected sheep/lamb skin (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_residues
• Range: Lot completeness screen, not a default factor
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 100000
  • Unit: kg/kg
  • Basis: per kg node output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Elementary flows

Process: Optional raw-skin preservation (preserve)

Inputs

Product flows

Fresh skin entering preservation (preserve_in)

Fresh-sale lots bypass this node entirely.

Denominator and scope requirements：per kg node output

Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

• Selected flow: Saleable fresh sheep/lamb raw skin (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_preserve
• Range: Lot completeness screen, not a default factor
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 100000
  • Unit: kg/kg
  • Basis: per kg node output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Electricity at the equipment supply point (preserve_energy_electricity)

Collection scope and applicability for preserve_energy. The following concrete identities have separate cards and apply only when use or generation is evidenced inside the original process scope. They are not mandatory inputs or a default recipe. Document non-use; missing records are not zero. Add a separate concrete card for any other actual material instead of substituting one of these names or UUIDs. Preserve attribution and boundaries and avoid double counting components included in outsourced services.

Meter by carrier, preservation node and service period. Denominator and scope requirements：per kg node output Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

Confirm identity, grade, state and unit from equipment, supplier and contemporaneous measurements; the product UUID does not establish actual use or upstream-provider compatibility. Retain the electricity supply point, fuel grade, density and heating-value basis. Distinguish purchased heat from on-site fuel conversion without counting its input fuel again.

• Selected flow: Alternating current 455f0ef5-6118-4f2b-a3f5-1f75e0afe3ca
• Flow property / unit: Energy / kWh
• Amount rule: Collect raw quantities for this identity under cp_utilities and calculate the exchange per declared reference flow using the original attribution rules.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per declared reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_utilities
• Sources: fao-agricultural-energy

This binding is alternating current at the use point with supply technology, voltage and provider unspecified. Confirm actual AC supply; DC requires a different identity. The database reference is 1 MJ: preserve meter kWh and convert once using 1 kWh = 3.6 MJ when linking reference quantities. Internal generation links to its foreground generator, without an additional purchased-electricity burden.

Waste flows

Elementary flows

Outputs

Product flows

Preserved still-raw skin (preserve_out)

Measure post-treatment mass, moisture, adhering salt and free media separately.

Denominator and scope requirements：per kg node output

Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

• Selected flow: Method-specific preserved untanned sheep/lamb skin (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_preserve
• Range: Lot completeness screen, not a default factor
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 1
  • Upper: 1
  • Unit: kg/kg
  • Basis: per kg node output
  • Basis kind: Process output (process_output)
  • Evidence kind: Collected record (collected_record)

Waste flows

Elementary flows

Process: Protective presentation and handover (handover)

Inputs

Product flows

Accepted fresh or preserved skin (handover_in)

Receive one lot from grading or preservation, not twice.

Denominator and scope requirements：per kg node output

Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output.

• Selected flow: Raw sheep/lamb skin in declared incoming state (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records.
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_handover
• Range: Lot completeness screen, not a default factor
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 100000
  • Unit: kg/kg
  • Basis: per kg node output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Elementary flows

Outputs

Product flows

Net raw sheep/lamb skin at actual gate (raw_skin_product)

Reference output excludes packaging and separable free salt/brine.

Raw reference-output records: Measure actual lot and reconcile node inputs, outputs and destinations. Preserve the measured accepted lot quantity and every required qualifier. The amount below is the normalized reference exchange, not an assertion that a physical lot contains only one unit.

Denominator and scope requirements：per reference flow

• Selected flow: Condition- and gate-qualified sheep/lamb raw skin
• Flow property / unit: Mass / kg
• Amount rule: 1 kg
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_handover
• Range: Lot completeness screen, not a default factor
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 1
  • Upper: 1
  • Unit: kg/kg
  • Basis: per 1 kg net reference product
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Collected record (collected_record)

Waste flows

Elementary flows

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
a_slaughter	slaughter route	Enumerate each genuinely marketable meat, skin, detached wool, milk or other output at its real phase and gate. Use documented causal physical attribution if defensible; otherwise document economic allocation with period-specific prices and sensitivity. Never assign all animal burden to the skin or automatic zero burden.	fao-hides-skins
a_fallen	fallen route	Document pre-existing animal burden, lawful recovery and terminal-treatment counterfactual; justify burden attribution and any separately reported avoided-treatment credit without invented meat.	fao-hides-statistics
a_grade	grades and cure	Count every saleable grade at one handover only; separately sold trim requires its own product decision. Moisture/salt mass changes do not create extra skin.	fao-hides-skins
a_period	phases and shared assets	Index breeding, lactation, shearing, finishing, slaughter/recovery and replacement across actual periods. Charge shared slaughter floor, cleaning, cold room and curing assets once using evidenced service time, throughput or other causal driver.	fao-hides-skins

Concrete cards do not inherit numerical ranges from the former aggregate card. Determine quantities from original records, stock/meter reconciliation and the declared reference flow; no default quantity or numeric screen is supplied without evidence matching the identity, unit, period and boundary. Missing range evidence is a quality disclosure, not zero use or proof of completeness.

8. Foreground Data Collection, Calculation, and Quality Rules

Specific input identification before dataset completion

Identify the actual input for this operation from supplier specifications, equipment and primary records. This is a mandatory collection requirement, not an exchange. Before dataset completeness, represent each used material, formulated product, carrier or independently purchased service by one physically specific card with its native quantity/property; confirm a compatible UUID, or retain an explicit unresolved identity and do not claim a fully linked dataset. Do not substitute a conditional example for an unknown actual input, invent a recipe, omit required use or infer zero from missing records. Attribute shared use, reusable assets and inclusive services once; preserve the original stage/period and measured throughput link to final reference output. The former aggregate range is not a component limit or consumption default.

requirement_id	collection_protocol_id	Preserved collection scope
preserve_salt_specific_input	cp_preserve	Operation preserve: Record only for relevant salted/brined batches and actual concentration; no default dose. Denominator and scope requirements：per kg node output Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output. Original quantity method: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records.
handover_package_specific_input	cp_handover	Operation handover: Record material and reuse; exclude later freight service. Denominator and scope requirements：per kg node output Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output. Original quantity method: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records.

Data Collection Protocols

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_source	source	cohort, actual slaughter or lawful recovery, independently marketable outputs by phase	lot ledger	cohort, actual slaughter or lawful recovery, independently marketable outputs by phase	calibrated scale, meter and tickets; Raw aggregation requirements: sum once by lot and period. Apply the existing route, period, conversion and allocation rules; retain raw totals and the measured accepted reference-output denominator for the same scope. Perform final normalization exactly once; do not divide an already normalized amount again. source_coproduct_specific_output: Preserve every actual intended output previously collected under source_coproduct, including products not represented by the conditional examples. This is a mandatory identification requirement, not an exchange. Before dataset completeness, instantiate a separate physically specific card for each actual product with material/species, physical state, native property/unit, measured quantity, recipient, gate and compatible UUID or exact unresolved identity. Keep original lot/period/throughput and Section 7 allocation duties; count a physical sale once and exclude products already in the selected reference-output denominator. Do not infer a product recipe, separation, numerical range or zero from missing records.	kg;period	each lot/period	all relevant events	actual site	per reference flow	calibration, source and dispatch record; traceable numerator, accepted reference-output denominator and normalization worksheet
cp_remove	remove	source event, intact raw skin, fleece and loss	lot ledger	source event, intact raw skin, fleece and loss	calibrated scale, meter and tickets; Raw aggregation requirements: sum once by lot and period. Apply the existing route, period, conversion and allocation rules; retain raw totals and the measured accepted reference-output denominator for the same scope. Perform final normalization exactly once; do not divide an already normalized amount again.	kg;period	each lot/period	all relevant events	actual site	per reference flow	calibration, source and dispatch record; traceable numerator, accepted reference-output denominator and normalization worksheet
cp_condition	condition	incoming, water, prepared skin, trim	lot ledger	incoming, water, prepared skin, trim	calibrated scale, meter and tickets; Raw aggregation requirements: sum once by lot and period. Apply the existing route, period, conversion and allocation rules; retain raw totals and the measured accepted reference-output denominator for the same scope. Perform final normalization exactly once; do not divide an already normalized amount again.	kg;period	each lot/period	all relevant events	actual site	per reference flow	calibration, source and dispatch record; traceable numerator, accepted reference-output denominator and normalization worksheet
cp_grade	grade	accepted, downgraded, rejected grades and destination	lot ledger	accepted, downgraded, rejected grades and destination	calibrated scale, meter and tickets; Raw aggregation requirements: sum once by lot and period. Apply the existing route, period, conversion and allocation rules; retain raw totals and the measured accepted reference-output denominator for the same scope. Perform final normalization exactly once; do not divide an already normalized amount again.	kg;period	each lot/period	all relevant events	actual site	per reference flow	calibration, source and dispatch record; traceable numerator, accepted reference-output denominator and normalization worksheet
cp_preserve	preserve	method, input/output mass, salt/brine, moisture, energy	lot ledger	method, input/output mass, salt/brine, moisture, energy	calibrated scale, meter and tickets; Raw aggregation requirements: sum once by lot and period. Apply the existing route, period, conversion and allocation rules; retain raw totals and the measured accepted reference-output denominator for the same scope. Perform final normalization exactly once; do not divide an already normalized amount again. preserve_salt_specific_input: Operation preserve: Record only for relevant salted/brined batches and actual concentration; no default dose. Denominator and scope requirements：per kg node output Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output. Original quantity method: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records. Identify the actual input for this operation from supplier specifications, equipment and primary records. This is a mandatory collection requirement, not an exchange. Before dataset completeness, represent each used material, formulated product, carrier or independently purchased service by one physically specific card with its native quantity/property; confirm a compatible UUID, or retain an explicit unresolved identity and do not claim a fully linked dataset. Do not substitute a conditional example for an unknown actual input, invent a recipe, omit required use or infer zero from missing records. Attribute shared use, reusable assets and inclusive services once; preserve the original stage/period and measured throughput link to final reference output. The former aggregate range is not a component limit or consumption default.	kg;period	each lot/period	all relevant events	actual site	per reference flow	calibration, source and dispatch record; traceable numerator, accepted reference-output denominator and normalization worksheet
cp_utilities	condition;preserve;handover	carrier, meter, node, asset and service period	lot ledger	carrier, meter, node, asset and service period	calibrated scale, meter and tickets; Raw aggregation requirements: sum once by lot and period. Apply the existing route, period, conversion and allocation rules; retain raw totals and the measured accepted reference-output denominator for the same scope. Perform final normalization exactly once; do not divide an already normalized amount again.	kg;period	each lot/period	all relevant events	actual site	per reference flow	calibration, source and dispatch record; traceable numerator, accepted reference-output denominator and normalization worksheet
cp_handover	handover	net/gross, package tare, state and gate	lot ledger	net/gross, package tare, state and gate	calibrated scale, meter and tickets; Raw aggregation requirements: sum once by lot and period. Apply the existing route, period, conversion and allocation rules; retain raw totals and the measured accepted reference-output denominator for the same scope. Perform final normalization exactly once; do not divide an already normalized amount again. handover_package_specific_input: Operation handover: Record material and reuse; exclude later freight service. Denominator and scope requirements：per kg node output Raw quantity and calculation requirements: Measure actual lot and reconcile node inputs, outputs and destinations. Original collection denominator kind: process_output. Original quantity method: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using the matched raw records. Identify the actual input for this operation from supplier specifications, equipment and primary records. This is a mandatory collection requirement, not an exchange. Before dataset completeness, represent each used material, formulated product, carrier or independently purchased service by one physically specific card with its native quantity/property; confirm a compatible UUID, or retain an explicit unresolved identity and do not claim a fully linked dataset. Do not substitute a conditional example for an unknown actual input, invent a recipe, omit required use or infer zero from missing records. Attribute shared use, reusable assets and inclusive services once; preserve the original stage/period and measured throughput link to final reference output. The former aggregate range is not a component limit or consumption default.	kg;period	each lot/period	all relevant events	actual site	per reference flow	calibration, source and dispatch record; traceable numerator, accepted reference-output denominator and normalization worksheet
cp_residues	source;remove;condition;grade;preserve;handover	material, mass, reason and actual destination	lot ledger	material, mass, reason and actual destination; stream material/product identity; composition and contamination state; native quantity and unit; item-mass/density conversion evidence; lot; net product and packaging mass; reuse/rework; recipient; treatment route; matched reference output	calibrated scale, meter and tickets; Raw aggregation requirements: sum once by lot and period. Apply the existing route, period, conversion and allocation rules; retain raw totals and the measured accepted reference-output denominator for the same scope. Perform final normalization exactly once; do not divide an already normalized amount again.; handover_reject_specific_output: At the actual sheep/lamb-skin handover, identify rejected raw skins separately from each discarded packaging material. Retain the actual fresh or preserved skin state, moisture/preservation basis, lot, rejection reason and disposal recipient. Reconcile node inputs, outputs and destinations, retaining the original per-kg-node-output collection basis. Apply inventory_reference_normalization and stage_throughput_linkage to matched records exactly once; the former aggregate completeness screen is not an individual-material default or limit. This is a mandatory collection and calculation requirement, not an inventory exchange. Before dataset completeness, create one physically specific card for each actual exported stream, including composition, state, native quantity/property, destination and evidenced product/waste role. Use only a compatible verified UUID, or explicitly register the concrete unresolved identity. Do not invent a packaging recipe, assume segregation, infer zero from missing evidence or omit a required stream. A real single mixed stream may remain one composition-defined identity only with collection/transfer evidence and compatible treatment; never duplicate it with its component exports. Keep separately handled liquid and solid streams distinct. Preserve original attribution, period, mass/water balances, reference denominator and treatment/service boundaries; link existing matching exchanges rather than count duplicates. Former aggregate ranges are not individual-stream defaults or limits.	kg;period; kg separately for each stream; native liquid volume separately; count and mass distinct	each lot/period	all relevant events	actual site	per reference flow	calibration, source and dispatch record; traceable numerator, accepted reference-output denominator and normalization worksheet

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
c_net	final lot	net skin = gross minus package tare and separable free salt/brine; disclose retained moisture/salt	cp_handover;cp_preserve	kg net skin	fao-hides-skins
c_balance	all operations	inputs plus added cure = sale grades plus rejects/residue plus water/stock change and residual	cp_remove;cp_condition;cp_grade;cp_preserve	kg residual	fao-small-ruminant-slaughter
c_period	animal and shared services	attribute each phase/service burden once across actual outputs and consuming nodes	cp_source;cp_utilities	burden/kg	fao-hides-skins
c_norm	reference lot	attributable measured quantity divided by positive net skin at same state and gate	cp_handover;cp_source	quantity/kg
handover_reject_specific_output	handover	At the actual sheep/lamb-skin handover, identify rejected raw skins separately from each discarded packaging material. Retain the actual fresh or preserved skin state, moisture/preservation basis, lot, rejection reason and disposal recipient. Reconcile node inputs, outputs and destinations, retaining the original per-kg-node-output collection basis. Apply inventory_reference_normalization and stage_throughput_linkage to matched records exactly once; the former aggregate completeness screen is not an individual-material default or limit. This is a mandatory collection and calculation requirement, not an inventory exchange. Before dataset completeness, create one physically specific card for each actual exported stream, including composition, state, native quantity/property, destination and evidenced product/waste role. Use only a compatible verified UUID, or explicitly register the concrete unresolved identity. Do not invent a packaging recipe, assume segregation, infer zero from missing evidence or omit a required stream. A real single mixed stream may remain one composition-defined identity only with collection/transfer evidence and compatible treatment; never duplicate it with its component exports. Keep separately handled liquid and solid streams distinct. Preserve original attribution, period, mass/water balances, reference denominator and treatment/service boundaries; link existing matching exchanges rather than count duplicates. Former aggregate ranges are not individual-stream defaults or limits.	cp_residues	actual stream-specific exchanges, destinations and nonduplicated mass balance
preserve_residue_identity_and_fate	preserve	Identify each actually separate material stream, composition, state and recipient. Keep spent preservation agents, brine, animal/plant material, packaging, drainage and intended co-products separate when separately handled; instantiate only streams actually evidenced at this operation. A physically mixed stream may have one composition-defined identity only with compatible treatment evidence, without also counting its components as additional exports. Distinguish marketed outputs, internal rework, waste transfer, purchased treatment and elementary discharge; do not duplicate treatment burdens. This replaces an ambiguous aggregate exchange, not the collection obligation. Before dataset completeness, create one concrete card per actual exchange, verify a compatible UUID or retain an explicit unresolved identity, and record quantity, unit, stage/period, destination and evidence. Reconstruct the raw attributable numerator from the linked protocol and normalize once to the matched accepted reference output. Missing data is not zero; no range of the former aggregate is an individual-stream default.	cp_residues	Identity-specific exchanges and reconciled activity records

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
q_identity	relevant lots	Confirm sheep/lamb, age, fleece, raw status, source legality, state, grade and gate.	source, batch and review records
q_mass	relevant lots	Calibrate net/tare and measure moisture/salt and batch residual; no assumed state conversion.	source, batch and review records
q_attribution	relevant lots	Retain actual outputs/phases, allocation basis, periods and shared-service driver worksheet.	source, batch and review records
q_uuid	relevant lots	Resolve state/gate-compatible concrete UUID before final TIDAS exchange construction.	source, batch and review records

9. Validation Rules

rule_id	Applies to	Rule	source_ids
v_scope	reference lot	Reject non-sheep/lamb, tanned or further prepared goods or missing age, fleece, state, gate or net mass.	un-cpc-3-notes
v_route	source and removal	Require an independent skin-removal handoff; slaughter route lists real co-products; fallen route has lawful recovery and no invented meat.	fao-hides-statistics;fao-small-ruminant-slaughter
v_balance	each batch	Reconcile accepted, downgraded and rejected skin, residue, stock and moisture/salt change, investigating residual against site measurement uncertainty.	fao-hides-skins
v_attribution	products, phases and shared services	Reject unsupported zero-burden skin, duplicated attached fleece/detached wool, repeated animal phase or shared plant burden, or absent allocation evidence.	fao-hides-skins
v_uuid	concrete dataset exchanges	Unresolved cards cannot become final exchanges; CPC label alone cannot make tanned sheepskin or manufactured leather an exact raw Mass flow.
v_foreground_emission_responsibility	Actual operated nodes and linked services	Record responsibility for on-site fuel combustion and refrigerant leakage when applicable: either quantified foreground emissions or a named linked process explicitly covering them, never merely a fuel-supply or electricity-production input. Assess special-taxon biological and residue emissions using species/route evidence, without a generic livestock factor. Identify any unresolved pathway and withhold a completeness claim; document supported absence and prevent duplicate upstream/downstream accounting.

10. Published Dataset Profile

Field	Value
dataset_role	Age-, fleece-, route-, state- and gate-qualified raw sheep/lamb skin foreground dataset.
downstream_use	Candidate secondary_dataset or background_dataset only after concrete exchange identity, review and publication.
allowed_use	Like-state/gate comparison or measured lot-specific salt/moisture conversion.
excluded_use	Goat skin, detached wool, tanned fleece-on skin, leather, universal fresh conversion or unsupported zero burden.
required_metadata	Age, source event/legal status, fleece, grade, state, net/tare, salt/moisture, gate, periods and allocation.
required_quality_disclosure	Co-product and period attribution, mass balance, cure recipe, rejects, shared services and unresolved UUID.
update_trigger	Exact raw-skin flow verification, changed route/gate or new measured state/allocation evidence.

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-notes	official_guidance	UN CPC 3.0 explanatory notes	species and raw-skin product boundary
fao-hides-skins	official_guidance	FAO Hides and Skins	source and preservation route
fao-small-ruminant-slaughter	official_guidance	FAO small-ruminant slaughter and curing	flaying and first conditioning
fao-hides-statistics	official_guidance	FAO hide production definitions	fallen-animal source
unido-leather-framework	official_guidance	UNIDO leather framework	pre-tannery boundary
fao-agricultural-energy	official_guidance	FAO Energy demand and consumption in African agriculture, Annex C case-study results, https://www.fao.org/4/v9766e/v9766e08.htm	conditional concrete identities and method context; does not establish site use or quantities