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We would like to see developed a set of search points based on MODS. In particular, this would be used when searching MODS records via SRU (though not intended exclusively for this purpose), so in SRU parlance, this would be a CQL context set (see "Additional Notes" below). The SRU implementors will hold a meeting in March, I would like to propose (prior to that meeting) a draft set of bibliographic search points based on MODS, and I'm asking this group (the MODS list) to help develop it. To begin, I've listed a set of search points. The list is a first cut and needs to be pruned, as I've included most everything. So I would like to ask those of you who might be willing to help on this: (1) which of these search points are candidates for pruning, that is, they are less- (or not-) likely to be searched; (2) which are most likely to be searched; (3) what search points likely to be searched are missing. Please note that even though I've probably included too many search points, I've also arbitrarily excluded several, so I'm hoping that some of you will give this critical review. Thanks for your help. Ray Denenberg BEGIN LIST ------------------------------------------ title title - abbreviated title translated title -alternative title - uniform title - sub title - part number name -personal name corporate name - conference name - part name - affiliation name - role resource type (enumerated) genre (controlled) place of origin (controlled) publisher date issued date created date captured date valid date modified copyright date edition issuance (enumerated) frequency language (controlled) physical form (controlled) reformatting quality (enumerated) internet media type extent digital origin (enumerated) abstract table of contents target audience (controlled) note subject - topic subject - geographic (controlled) subject - temporal subject - title subject - name subject - cartographic scale subject - cartographic projection subject - cartographic coordinates subject - occupation classification (controlled) identifier-hdl identifier-doi identifier-isbm identifier-isrc identifier-ismn identifier-issn physical location location URL access condition part- detail - number part- detail - caption part- detail - title part - extent - start part - extent - end part - extent - total part - date ----------------------------------------- END LIST Additional Notes. (Which you don't have to read by which may be helpful.) The SRU protocol specifications are available at http://www.loc.gov/sru/; for CQL see http://www.loc.gov/sru/cql/. CQL calls search points "indexes", actually "abstract indexes" -- "abstract" for two reasons: (1) There is no implementation implication -- support of a search point does not necessarily require that you implement an index. (2) The index does not necessarily correspond directly to an element in the record. In this case, each index *does* correspond to a MODS element, but the names are different, deliberately so, in order to maintain this independence -- in theory, these indexes could be used to search records other than MODS if there is an appropriate mapping. But in this case it should be clear for each index what MODS element it corresponds to (if not, then the index is poorly named). Note also, these are *flat* indexes that do not directly reflect the xml structure. CQL indexes are analogous to Z39.50 Use attributes; see http://www.loc.gov/z3950/agency/defns/bib1.html#use The motivation for this effort is twofold: (1) There are current projects where MODS records are being harvested (e.g. via OAI) and the harvested records are then searched. For example see the DLF Aquifer project (http://www.diglib.org/aquifer/). (2) SRU/CQL has not really developed a coherent set of bibliographic search points. Some observations about point (2). - CQL has defined a "dublin core" index set. It is useful for some applications but of little or no value for bibliographic searching. - The Z39.50 bib-1 set is not a good place to start. It began to grow out-of-control a number of years ago because of some deficiencies in the protocol and more particularly some of the implementations. We've addressed these deficiencies in SRU/CQL. - There is a Bath profile for CQL which specifies a number of bibliographic indexes, but it doesn't seem rich enough. - There is also in development a MARC index set - we think that a bibliographic and a MARC index set will complement each other, the first is abstract and the second is concrete. Finally, the concept of an "index set" -- a set of related abstract indexes (or seach points) -- actually has been generalized into the concept of a "context set" in CQL, which is described at http://www.loc.gov/standards/sru/cql/index.html#context. A context set in CQL is loosely analogous to a Z39.50 attribute set, and an index set would be analogous to the set of Use attributes for an attribute set.