[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Parameter Entity Replacement and the XML 1.0 Grammar
Hi folks! Down below I have an example extrapolated from working markup I've been using with XT for months. To parameterize my production environment, I use parameter entities quite a bit, as you can see in the file "test.ent". XT has been accepting this declaration of NDATA entities, giving me the equivalent as if the replacement values were correctly replaced. Today I started using a validating parser on the source file and it is choking on the entity declaration. I immediately thought the new parser I was using was at fault, but thought I'd check XML 1.0 and saw that perhaps parameter entity references are not allowed according to the grammar: [71] GEDecl ::= '<!ENTITY' S Name S EntityDef S? '>' [73] EntityDef ::= EntityValue | (ExternalID NDataDecl?) [75] ExternalID ::= 'SYSTEM' S SystemLiteral [11] SystemLiteral ::= ('"' [^"]* '"') | ("'" [^']* "'") [76] NDataDecl ::= S 'NDATA' S Name [5] Name ::= (Letter | '_' | ':') (NameChar)* [4] NameChar ::= Letter | Digit | '.' | '-' | '_' | ':' | CombiningChar | Extender But .... according to 4.4.8 parameter entity references can wholly replace integral grammatical tokens, so perhaps the use of parameter entity references is *outside* the grammar productions of XML 1.0. So, my question is: Does 4.4.8 take precedence over the grammar productions (the new parser is incorrect), or is the behaviour I am used to not correct (XT is incorrect)? My belief is I've been working properly all along, XT is correct, and the new parser is incorrect. Thanks for any help you can be. ............. Ken T:\ftemp>type test.xml <?xml version="1.0"?> <!DOCTYPE doc [ <!ELEMENT doc EMPTY> <!ATTLIST doc file ENTITY #REQUIRED> <!ENTITY % test SYSTEM "test.ent"> %test; ]><doc file="abc"/> T:\ftemp>type test.ent <!ENTITY % e "wmf"><!--non .gif extension--> <!NOTATION %e; SYSTEM ""> <!ENTITY % filename "'abc.%e;'"> <!ENTITY abc SYSTEM %filename; NDATA %e;> <!--end of file--> T:\ftemp>type test.xsl <?xml version="1.0"?> <!DOCTYPE xsl:stylesheet []> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"> <xsl:output method="text"/> <xsl:template match="/doc"> Value is: <xsl:value-of select="unparsed-entity-uri(@file)"/> </xsl:template> </xsl:stylesheet> T:\ftemp>xt test.xml test.xsl test.txt T:\ftemp>type test.txt Value is: file:/T:/ftemp/abc.wmf T:\ftemp>call xml test.xml Parsing: 'test.xml' for XML errors [Fatal Error] test.ent:4:21: The system identifier must begin with either a single or double quote character. T:\ftemp> -- G. Ken Holman mailto:gkholman@C... Crane Softwrights Ltd. http://www.CraneSoftwrights.com/x/ Box 266, Kars, Ontario CANADA K0A-2E0 +1(613)489-0999 (Fax:-0995) Web site: XSL/XML/DSSSL/SGML services, training, libraries, products. Practical Transformation Using XSLT and XPath ISBN 1-894049-02-0 Next instructor-led training: 1999-12-05/06, 1999-12-07, - 2000-02-27/28, 2000-05-11/12, 2000-05-15 xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1 To unsubscribe, mailto:majordomo@i... the following message; unsubscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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