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Draft plan for metadata exchange.md

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Draft plan for metadata exchange

Brightway Excel LCI format

In general, this needs a more formal specification.

The column labels are fixed by the labels used by Brightway.

Required attributes for metadata file

  • Version

  • License

  • Author

  • Dependencies

  • URI

  • List of strategies (plus libraries with strategies? Notebooks/python files?)

In metadata or following Futura recipe YAML?

Optional attributes for metadata file

  • Brightway library versions
  • Other optional libraries

Dependencies & Storage

Brightway can offer storage services for easy download through support from Départ de Sentier, but having something like Zenodo would be preferable.

Question: Do we need a "lite" storage to see if data is already present (to avoid unnecessary downloads)?

Question: Do we need to invent a unique identifier for LCI databases? Or make up a URI scheme? Is Zenodo download link a good URI?

Question: Single centralized library repo versus decentralized approach with search-engine-based discovery? Interaction with existing efforts, e.g. GLAD, OpenLCA NEXUS?

Question: How to handle links to proprietary dependencies?

Question: Security of external strategies. Maybe have one "blessed" repo with external strategies?

Question: Can we issue DOIs for data? Free versus paid?

Question: Do we need "known good result" tests?

Brightway capabilities needed

Add functionality to import this data, and to download dependent databases

Need functionality to see if and when datapackages conflict

AB Superstructure scenario format

Headers

Headers are a mix of fixed values and scenario labels.

Proposal: Fix these values and number of columns as currently used.

Question: Is flow type reqiured and guaranteed to be correct?

Scenario labels don't seem to have a naming convention. That's probably fine? But the metadata needs to have more information.

Required attributes for metadata file

  • Version
  • License
  • Author
  • Dependencies
  • URI

I don't think we need custom strategies?

Storage

Same questions apply. In general, these files are larger, but not necessarily large. Chris will clarify if his institution can provide hosting - it would be good to have mirrors at other institutions.