EBA/EIOPA Taxonomy architecture 2.0

  • 9th May 2023

EBA Taxonomy architecture v2.0The EBA and EIOPA have been working with Eurofiling to produce a revised version of the Taxonomy Architecture 2.0. To implement the improvements introduced by DPM Refit to data point modelling, like historization of certain concepts, and to simplify the structure by removing unnecessary artefacts, such as normative codes for taxonomy frameworks.
XBRL taxonomies created under this updated architecture remain fully compliant with the XBRL standard.

The main changes compared with the earlier taxonomy architecture are:

  1. Application of versioning on extensible enumeration metrics, hierarchies of domain members and dimensions.
  2. Use of release numbers instead of publication dates in release folders.
  3. Removal of redundant folders and files (e.g.: presentation linkbase).
  4. Removal of not useful folders and files (e.g., normative folder, dpm-ids).
  5. Addition of {module}-ignore-val.xml to deactivate the assertions in a module.
  6. EIOPA Taxonomy architecture v2.0Change in the implementation of validation rules:
    • With the earlier Taxonomy Architecture, one assertion may trigger multiple evaluations. Under the new architecture, for each such evaluation a separate assertion may created and stored together in one assertion file. E.g.: validation rule v2843_m applies to multiple rows; hence it implemented in assertions as v2843_m_001, v2843_m_002, and all these assertions stored in one file v2843_m.xml.
    • Assertion error messages and labels included in the assertion files (instead of separate files per assertion: {vr}-lab.xml and {vr}-err.xml).
    • aset-{prereq}.xml files removed (to not depend on these files for XBRL processing), instead
    • {module}-val-tabs.xml files per module added to explicitly specify applied table(s) for each validation rule (to substitute for the loss of information by removing the asset files)
    • {module}-ignore-val.xml files added in set folders to apply automatic deactivation in the taxonomy.

The earliest possibility to apply this revised Taxonomy architecture 2.0 in the EBA taxonomies could be for release 3.4 or release 4.0.

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