ILCD XML: The Passport Your LCA Data Needs

Why digital EPD data needs one language

Building information models expect structured inputs the way streaming apps expect MP3s. Give them a random text file and playback stalls. ILCD XML supplies a common dictionary so any LCA, EPD database, or carbon calculator can read the same track without remixing. The European Commission calls it “a basis for assuring quality and consistency of life-cycle data” (European Commission JRC, 2024).

What exactly is ILCD + EPD XML?

ILCD stands for International Life Cycle Data system. It is an XML schema first issued by the EU’s Joint Research Centre. The InData Working Group grafted construction-specific fields onto that core, yielding ILCD + EPD: one file type that captures all EN 15804 indicators, verifier details, and even biogenic carbon splits (InData, 2024).

Under the hood: seven dataset types

• Process – the engine room of inputs and outputs.
• Flow – each material or emission with its CAS tag.
• Flow property – mass, energy, or whatever unit rules apply.
• Unit group – kilogram, megajoule, tonne-kilometre, and friends.
• LCIA method – the math behind impact factors.
• Source – literature or measurement references.
• Contact – who to call when numbers look odd. These blocks sit in neat folders that any XML editor or LCA tool can open.

XML tags that make audits traceable

Every dataset carries a UUID, time stamp, and version flag. Change one value and the file history shows it. That transparency shaves hours off third-party checks because reviewers can pinpoint edits instead of rereading forty pages.

Version 1.2 MR6: small file, big upgrade

The 2024 release adds EN 15804 A2 alignment, explicit biogenic carbon rows, and a trimmed list of mandatory fields that cuts deadweight by roughly 15 % (InData v1.2 MR6, 2024). Faster uploads, fewer validation errors, happier BIM integrators.

How ILCD speeds up future EPDs

Once your plant data lives in ILCD, new formulations or plant shifts become copy-edit jobs, not reinventions. Many program operators now accept direct XML submission, slicing week-long formatting loops to a single afternoon. Reliable crosswalks also mean you can mirror the same file into ÖKOBAUDAT or EC3 without manual recoding.

Common tripwires (and easy fixes)

Duplicate UUIDs confuse importers. Validate files with the free InData tool before you hit send. Units matter too: list water in kilograms, not litres, unless the flow property says volume. Finally, check language tags; English defaults to “en”, not “eng”. It seems petty but it’s what breaks auto-parsers.

Usable data, usable speed

ILCD XML will not write your LCA for you, but it will make sure every gram of CO₂ you report can glide friction-free from factory floor to project bid. Miss this train and you will keep paying the slow tax. Its really that simple.