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BM extensions to CRM
Developed by Seme4 as part of BM data mapping to CRM

D2 - Commentary on the mapping process- from BM to CIDOC-CRM.pdf
Hugh Glaser, SotonU

  • very informative description of the mapping, shows the complexity of museum data.
  • detailed description of the developed CRM extension ontology (BMX).
  • [^bm-extensions.ttl]: BMX ontology definition
  • live links to CRM & BMX classes
  • live links to BM objects, but these are restricted
  • instructive usage guide for the CRM. Mariana got some ideas re the Goteborg Museum mapping (part of MOLTO)
  • instructive re proposal on Archaeological metadata (Totko Stoyanov)

D1 - BM to ResearchSpace- Conversion Process and Schema.pdf


  • CRM is a very rich ontology, but still not rich enough to capture collection data from different institutions
  • BMX shows that extensions are needed
  • the BM should drive towards unification and vigorously promote such extensions for CRM standardization, rather than relying on thesaurus mapping (mapping profiles) and co-reference, which make for more difficult reasoning
  • BMX itself can be improved. Here are two examples from the very simple area of measurements (eg width, height):
    • Rather than using BM-specific URIs for units, it'd be better to map during conversion to ontologies that are more established in this area: NASA QUDT (Quantities, Units, and Dimensions) or OASIS UoM (Units of Measure)
    • CRM uses a single number (P90_has_value is E60_Number) while BMX extends this to an interval (PX.min_value and PX.max_value). However, no connection is made between the interval and the single value. The single value should be computed during conversion, e.g. to be the average of min and max, or equal to min if max is undefined
    • Better yet [E60_Number should be a class]
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