- From: Seaborne, Andy <andy.seaborne@hp.com>
- Date: Tue, 02 Jan 2007 11:37:23 +0000
- CC: Eric Prud'hommeaux <eric@w3.org>, public-rdf-dawg@w3.org
Seaborne, Andy wrote: > > > Eric Prud'hommeaux wrote: >> Matching "abcd:" against QName, >> [66] QName ::= QNAME | QNAME_NS >> [69] QNAME_NS ::= NCNAME_PREFIX? ':' >> [70] QNAME ::= NCNAME_PREFIX? ':' NCNAME? >> I get two possible solutions: >> QNAME_NS and QNAME >> >> The only reference to QName is in >> [65] IRIref ::= Q_IRI_REF | QName >> so I think we can just change QNAME to not have the NCNAME optional. >> [70] QNAME ::= NCNAME_PREFIX? ':' NCNAME >> >> In some sense, lexer ambiguities don't exist in lex; the winner is the >> first, longest production to match the input string, but it does make >> life harder for parser writers. > > OK - good idea - changed to: > > QNAME_NS ::= NCNAME_PREFIX? ':' > QNAME_LN ::= QNAME_NS ':' NCNAME Or even the correct: QNAME_LN ::= QNAME_NS NCNAME Andy > > (LN = LocalName) > > Andy > > > > > > >
Received on Tuesday, 2 January 2007 11:37:35 UTC