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| | Z39.50 Attribute Architecture |
 | | Attributes from attribute sets conformant to Class 1 should not be mixed, within a query operand, together with attributes from historical attribute sets defined prior to the development of this attribute architecture (e.g. |
 | | Thus when a client omits an attribute of a given type from an operand (unless that type is not applicable for the given attribute combination, or unless the attribute type is mandatory) the client is, in effect, leaving it to the server to select a value. |
 | | This attribute may be used to indicate, for example, that thesaural expansion, singular/plural matching, part of speech qualification, phonetic matching, case sensitivity, stemming, truncation (including left and/or right anchored as well as word-by-word truncation), or various loose forms of phrase matching, should be used in the query evaluation. |
| www.loc.gov /z3950/agency/attrarch/arch.html (5524 words) |
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