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FRBRoo, the IFLA Library Reference Model and now LRMoo

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Slides from IFLA WLIC 2018 session 74
The Impact of Recently Approved IFLA Standards

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FRBRoo, the IFLA Library Reference Model and now LRMoo

  1. 1. FRBRoo, the IFLA Library Reference Model, and now LRMoo : A circle of development Pat Riva (Concordia University, Canada) Maja Žumer (University of Ljubljana, Slovenia) August 25, 2018 IFLA WLIC 2018, Kuala Lumpur
  2. 2. Background Modelling is never a simple straightforward process. We need: • Participants from different backgrounds • Open discussions, clarifications • Reflection • Flexibility WLIC 2018, Kuala Lumpur 2
  3. 3. FRBR (1998) FRBRoo 1.0 (2009) FRBRoo 2.4 (2016) LRM (2017) FRAD (2009) FRSAD (2010) WLIC 2018, Kuala Lumpur 3
  4. 4. Entity-relationship to object-oriented FRBR (1998) FRAD (2009) FRSAD (2010) LRM (2017) FRBRoo 1.0 (2009) FRBRoo 2.4 (2016) LRMoo WLIC 2018, Kuala Lumpur 4
  5. 5. Previous Rounds of Development  FRBR (1998) transposed to create FRBRoo 1.0 (2009)  FRAD (2009) and FRSAD (2010) added to produce FRBR 2.4 (2016)  A “consolidated” model  IFLA LRM (2017) now being transformed to create LRMoo (renamed from FRBRoo 3.0) WLIC 2018, Kuala Lumpur 5
  6. 6. Influence of FRBRoo on LRM  We will look at 3 areas of influence  Entity hierarchies  Representativity  Modelling of bibliographic identities WLIC 2018, Kuala Lumpur 6
  7. 7. Entity hierarchies  CIDOC CRM organises classes in a superclass / subclass structure  FRBRoo does so also  Many advantages in simplification of properties  LRM adopted an enhanced entity-relationship framework with a 3-level entity hierarchy  Streamlining of attributes and relationships  Particularly visible with Agent  Res as superclass WLIC 2018, Kuala Lumpur 7
  8. 8. Representativity in FRBRoo  FRBRoo 1.0 introduced classes and properties F41 Representative Manifestation Assignment F42 Representative Expression Assignment R40 has representative expression R41 has representative manifestation product type  Assuming that features of a specific manifestation and expression are used to identify the work WLIC 2018, Kuala Lumpur 8
  9. 9. Representativity in LRM  WWR version of LRM used a yes/no expression attribute for labelling a given expression as representative or not of the work  Reworked in approved LRM as the work attribute LRM-E2-A2 Representative Expression Attribute  To be typed to hold values at the work level, of expression attributes that characterise the work (the particular expression is not identified / described) WLIC 2018, Kuala Lumpur 9
  10. 10. Bibliographic Identities in FRBRoo  FRAD included personas in the person entity  FRAD and FRSAD defined entities for appellations, instead of using attributes  FRBRoo 2.4 viewed identities as nomen used in a specific context attested to in a source  Defined F35 Nomen Use Statement, class which links a nomen to its meaning  Person remained compatible with E21 Person WLIC 2018, Kuala Lumpur 10
  11. 11. Bibliographic Identities in LRM  LRM models bibliographic identities as nomens assigned to agents in contexts  Nomen attributes include:  LRM-E9-A5 Context of use  LRM-E9-A6 Reference source  LRM-E9-A2 Nomen string  LRM-E9 nomen defined as a reified relationship  “association between an entity and a designation that refers to it” WLIC 2018, Kuala Lumpur 11
  12. 12. Towards LRMoo  Work started April 2017  LRMoo Working Group appointed at WLIC 2017  Bring oo model into conformity with LRM  Critically assess FRBRoo 2.4  Opportunities for simplification  Fit with new design principles for CRM extensions—FRBRoo was the first extension, now there is a CIDOC CRM “family” WLIC 2018, Kuala Lumpur 12
  13. 13. Influence on CIDOC CRM  Distinction between work and expression brought into CRM via new subclasses of E28 Conceptual Object  E89 Propositional Object (superclass of F1 Work)  E90 Symbolic Object (superclass of F2 Expression)  Declaration of E99 Product Type  Review of special types of E41 Appellation, deprecated E82 Actor Appellation WLIC 2018, Kuala Lumpur 13
  14. 14. Future Development • LRMoo draft to be completed in 2018 (?) • Testing of LRM in implementations • Extensions and refinements for different contexts WLIC 2018, Kuala Lumpur 14

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