GordonDunsire
commented
9 years ago The ISBD and FRBR Review Groups discussed a related issue: the relationship between ISBD Resource and FRBR WEMI (see http://www.ifla.org/files/assets/cataloguing/isbd/OtherDocumentation/resource-wemi.pdf). As a result, the relationship properties were added to the ISBD element set, for example http://iflastandards.info/ns/isbd/elements/P1190 (has expression aspect) with definition "Relates a bibliographic resource to an expression reflected in it."
These properties are constrained by ISBD and FRBR domains and ranges, but the ISBD RG intends to publish unconstrained versions of the whole element set, which leads to a similar issue.
There is an assumption in the RDA unconstrained property labels and definitions that "resource" is closer in semantics to the ISBD Resource class than to the RDA Toolkit definition and scope note "A work, expression, manifestation or item. The term includes not only an individual entity but also aggregates and components of such entities (e.g., three sheet maps, a single slide issued as part of a set of twenty, an article in an issue of a scholarly journal). It may refer to a tangible entity (e.g., an audiocassette) or an intangible entity (e.g., a website)." The semantics are unclear: "or" appears to mean "and/or", in any combination of WEMI entities.
That is why the RDA element set does not include a class Resource.
The WEMI relationship properties are not mapped as sub-properties of relatedResource (P60313) for similar reasons. The RDA Development Team can review this if you can elaborate on "good enough".
kiegel
kcoyle
There is a group of constrained properties that are difficult to handle when WEMI entities are removed from them, that is, they are unconstrained:
exemplarOfManifestation (P30103) expressionManifested (P30139) expressionOfWork (P10078) manifestationExemplified (P40049) manifestationOfExpression (P20059) manifestationOfWork (P10072) workExpressed (P20231) workManifested (P30135)
They reduce to either "blankOfBlank" or "blankBlankified". However, these properties embody relationships between WEMI entities and the relationships cannot be ignored, even in an unconstrained model. It is crucial to relate a Manifestation to its Expression or Work, even though we may not necessarily use those terms.
It seems that a generalized, unconstrained WEMI-relationship property must be created. The existing relatedResource (P60313) may be too narrow, or perhaps it is good enough.