6178 2008-10-21 22:17:31 +0000 [FT] Syntax of the "weight" option 2008-11-02 12:48:52 +0000 1 1 1 Unclassified XPath / XQuery / XSLT Full Text 1.0 Working drafts PC Linux CLOSED FIXED P2 normal --- 1 xfranc jim.melton pcase public-qt-comments oldest_to_newest 22227 0 xfranc 2008-10-21 22:17:31 +0000 The weight option is defined by the following production: [144] FTSelection ::= FTOr FTPosFilter* ("weight" RangeExpr)? This means that in this expression the weight applies to the FtAnd expression, not the term "bar": "foo" ftand "bar" weight 2 This is equivalent to: ("foo" ftand "bar") weight 2 No to: "foo" ftand ("bar" weight 2) Now, my feeling is that when writing the 1st expression, a programmer would probably mean the second form: "foo" ftand ("bar" weight 2) In other terms, this syntax seems misleading to me. A related problem is that it is possible to specify a weight twice on the same expression: ("foo" ftand "bar" weight 2) weight 1 Here both weight options apply to the FtAnd. Suggestion: move the "weight" option to the level of FTPrimaryWithOptions: [149] FTPrimaryWithOptions ::= FTPrimary FTMatchOptions? ("weight" RangeExpr)? [144] FTSelection ::= FTOr FTPosFilter* 22297 1 pcase 2008-10-30 18:04:35 +0000 Xavier, The Full Text Task Force at its 10/30/2008 face-to-face meeting agreed to change the grammar for weights as you proposed to: [149] FTPrimaryWithOptions ::= FTPrimary FTMatchOptions? ("weight" RangeExpr)? [144] FTSelection ::= FTOr FTPosFilter* Thank you for making this suggestion. The change will appear in the next published version of specification. We also discussed the related problem that you raised -- that it is possible to specify a weight twice on the same expression. Because the effect of weights on the resulting score is implementation-dependent, we decided to leave this detail implement-dependent as well. Pat Case, Member, Full Text Task Force 22298 2 pcase 2008-10-30 18:07:34 +0000 Xavier, If you approve of the response to the bug noted above, please close the bug. Pat Case, Member, Full Text Task Force