TianGong PCR · Product category rules

Find an applicable PCR before modelling begins

Product category rules define the scope, reference flow, data collection and validation requirements for a product category. This library publishes TianGong LCA PCR records in Chinese and English, with byte-verifiable source files.

Browse the PCR catalogSee CPC classification coverage

What one PCR record contains

A real record from this library. Every field expands to its complete value on the record page.

  1. ScopeThe product-category boundary this PCR covers, and the neighbouring categories it does not.
  2. Reference flowThe functional unit, flow direction and quantity basis that later processes and models align to.
  3. Data collectionProcess inventory, required fields and units — what a foreground data package must provide.
  4. ValidationCheck rules, data-quality requirements and how unresolved relationships are handled.
Example recordParts of soil machinery
CandidateAuthored methodology
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Library state

PCR records743
Domains5
Content languageszh-CN · en-US
Source commit4e55b3a1df90

These records are candidates: methodology is authored but has not completed methodology review. Publishing a website does not approve methodology.

Source commit: 2026-09-15

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Each domain groups its records by subdomain; every record has its own page.