Jenn, I can't claim to have spent sufficient time looking at this,  
but... are you on the RDA-L list? Because we just went through a very  
long discussion there in which we concluded that a text aggregate  
(possibly analogous to a sound recording aggregate) is an expression,  
not a "set" of separate work/expression entities. Your example implies  
the latter, with the aggregate being described only at the  
manifestation level. (And now I'm confused as to what the work would  
be in something like a text collection, such as an anthology of poems.  
Would the anthology be a work?)

kc


Quoting "Riley, Jenn" <[log in to unmask]>:

> The Variations/FRBR project at Indiana University   
> (http://vfrbr.info) is pleased to announce the release of an initial  
>  set of XML Schemas for the encoding of FRBRized bibliographic data.  
>  The Variations/FRBR project aims to provide a concrete testbed for   
> the FRBR conceptual model, and these XML Schemas represent one step   
> towards that goal by prescribing a concrete data format that   
> instantiates the conceptual model. Our project has been watching   
> recent work to represent the FRBR-based Resource Description and   
> Access (RDA) element vocabulary in RDF; however, due to the fact   
> that this work represents RDA data rather than FRBR data directly,   
> and that much metadata work in libraries currently (though perhaps   
> not permanently) operates in an XML rather than an RDF environment,   
> we concluded an XML-based format for FRBR data directly was needed   
> at this time. We view XML conforming to these Schemas to be one   
> possible external representation of FRBRized data, and will be   
> exploring other!
>   representations (including RDF) in the future. We define   
> "implementing FRBR," as the conceptual models described in the   
> companion FRBR and FRAD reports; at this time we are not actively   
> working on the model defined in the draft FRSAD report. Perhaps the   
> most notable feature of the Variations/FRBR XML Schemas is their   
> existence at three "levels": frbr, which embodies faithfully only   
> those features defined by the FRBR and FRAD reports; efrbr, which   
> adds additional features we hope will make the data format more   
> "useful"; and vfrbr, which both contracts and extends the FRBR and   
> FRAD models to create a data representation optimized for the   
> description of musical materials and we hope provides a model for   
> other domain-specific applications of FRBR.
>
> A User Guide with details on the structure of the Schemas and how   
> they relate to one another may be found at   
> http://vfrbr.info/schemas/1.0/UserGuide.pdf, and links to all   
> Schemas and documentation may be found at   
> http://vfrbr.info/schemas/1.0. We hope this Schema release will lead  
>  to further discussion of FRBR implementation issues within the   
> community. Comments and questions on the Variations/FRBR Schema   
> release may be sent to [log in to unmask]
>
> Variations/FRBR is generously funded through a National Leadership   
> Grant from the Institute of Museum and Library Services   
> <http://www.imls.gov>.
>
> (And a big kudos goes to the V/FRBR project team:   
> http://www.dlib.indiana.edu/projects/vfrbr/people/index.shtml.   
> Thanks to all of you, and especially to Paul, Mark, and Ilias.)
>
> Jenn
>
> ========================
> Jenn Riley
> Metadata Librarian
> Digital Library Program
> Indiana University - Bloomington
> Wells Library W501
> (812) 856-5759
> www.dlib.indiana.edu
>
> Inquiring Librarian blog: www.inquiringlibrarian.blogspot.com
>

-- 
Karen Coyle
[log in to unmask] http://kcoyle.net
ph: 1-510-540-7596
m: 1-510-435-8234
skype: kcoylenet