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David Bearman wrote: > > It is not clear why what you are calling formats, which I think are data > validation rules, are relevant to resource discovery, though they clearly > are important metadata for subsequent phases of the research process when > the retrieved data is to be collated with other information. Two examples of formats: date formats (eg ISO 8601) and name formats (eg AACR2). If we don't know how to interpret the string, we are hampered when doing resource discovery. > At the same > time, the concept you are calling controlled vocabularies which consists of > terminology on the one hand and classification systems on the other, is > something more than a set of allowable data values, it reflects a world > view. It is because the scheme reflects a worldview that we would want to > discover resources with a limit set to those which have that worldview. > I can't see any reason why measurement units per se are a scheme in this > sense, though the use of particular schemes in the sense of > classification/terminology to control values of measurement units reflects > definite disciplinary constructs that could be important to retrieval (time > measured in geological periods, space measured in astronomical units, > weight measured in atomic weights). As I understand the argument, all schemes are (from a DC point of view) additional information which, if understood and used, may greatly improve resource discovery. If not understood, they may be ignored, resulting in a greater or lesser degradation in the resource discovery process. Right? --------------------------------------------------------------------------- Misha Wolf Email: [log in to unmask] 85 Fleet Street Standards Manager Voice: +44 171 542 6722 London EC4P 4AJ Reuters Limited Fax : +44 171 542 8314 UK --------------------------------------------------------------------------- 12th International Unicode Conference, 8-9 Apr 1998, Tokyo, www.unicode.org 7th World Wide Web Conference, 14-18 Apr 1998, Brisbane, www7.conf.au ------------------------------------------------------------------------ Any views expressed in this message are those of the individual sender, except where the sender specifically states them to be the views of Reuters Ltd.