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[XPath] A.2.2 Parsing note from Willink, Ed on 2004-01-27 (public-qt-comments@w3.org from January 2004)
[XPath] A.2.2 Parsing note
- From: Willink, Ed <Ed.Willink@thalesgroup.com>
- Date: Tue, 27 Jan 2004 12:00:24 -0000
- To: "'public-qt-comments@w3.org'" <public-qt-comments@w3.org>
- Message-ID: <51BF576D5A02CC4CB2591F50994FD76654E0B7@NTS013.uk.trt.thales>
Hi The tables are _not_ a declarative way to specify behaviour. They are a highly imperative imposition of a solution that then has to be disclaimed except in so far as it still has to be observed. The declarative approach is to specify that the preceding BNF when interpreted at a lexical level maximising the length of tokens such as QName and then in the conventional LALR(1) shift-reduce fashion has exactly one shift-reduce conflict on a leading "/" that is to be resolved as per grammar-note:leading-lone-slash. All other <> grouping annotations and lexical tables should be a non-normative guide that may be of assistance to those pursuing an LL approach. Regards Ed Willink ------------------------------------------------------------------------ E.D.Willink, Email: mailto:EdWillink@iee.org Thales Research and Technology (UK) Ltd, Tel: +44 118 923 8278 (direct) Worton Drive, or +44 118 986 8601 (ext 8278) Worton Grange Business Park, Fax: +44 118 923 8399 Reading, RG2 0SB ENGLAND https://www.computing.surrey.ac.uk/personal/pg/E.Willink ------------------------------------------------------------------------
Received on Wednesday, 28 January 2004 04:41:44 UTC