XML DTD and XSLT issue

nehap8 · October 12th, 2011, 03:05 PM

I am new to xslt so please excuse my naive question.
I have an xml file with DTD, when I try to convert this xml file to html using xslt, I get errors. When i remove the DTD and repeat the process i get no errors. Please advice me on this issue.

XML with DTD:

<!DOCTYPE art public "-//ES//DTD full length article DTD version 4.3.1//EN"[]><ART VERSION="4.3.1" JID="AOS" AID="392" DOCSUBTY="FLA" PII="S0361368202000302" DOI="10.1016/S0361-3682(02)00030-2"><COPYRIGHT TYPE="full-transfer" YR="2003">Elsevier Ltd</COPYRIGHT><FM><ATL>The colour of accountancy: examining the salience of race in a professionalisation project</ATL></FM></ART>

XML without DTD:

<ART VERSION="4.3.1" JID="AOS" AID="392" DOCSUBTY="FLA" PII="S0361368202000302" DOI="10.1016/S0361-3682(02)00030-2"><COPYRIGHT TYPE="full-transfer" YR="2003">Elsevier Ltd</COPYRIGHT><FM><ATL>The colour of accountancy: examining the salience of race in a professionalisation project</ATL></FM></ART>

XSL:

<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns="http://www.w3.org/TR/REC-html40" >
<xsl:output method="html" encoding="UTF8" />
<xsl:strip-space elements="*"/>

<xsl:template match="/">
<html>
<head><title>Hello</title></head>
<body>Title:
<xsl:value-of select="/ART/FM/ATL"/>
</body></html>
</xsl:template>
</xsl:stylesheet>

Thanks,
Neha

samjudson · October 13th, 2011, 05:31 AM

Well I don't know much about Doctype declarations, but I suspect you get errors because the DTD isn't valid.

Saxon gives me the following error: "The document type declaration for root element type "art" must end with '>'"

So basically your XML document isn't valid. Fix that and you should be fine.

Martin Honnen · October 13th, 2011, 07:52 AM

Can you tell us which error exactly you get?
One problem I see is that XML is case-sensitive so if you have "DOCTYPE art" then the root element's name needs to be "art" and not "ART" as you have it in your sample.

mrame · October 13th, 2011, 08:20 AM

If you have rights to edit the XML then change

Code:

<!DOCTYPE art public "-//ES//DTD full length article DTD version 4.3.1//EN"[]>

to

Code:

<!DOCTYPE ART PUBLIC "-//ES//DTD full length article DTD version 4.3.1//EN" "dummy.dtd" []>

Just create a dummy.dtd file in the path of XML. You wont face any error.

nehap8 · October 13th, 2011, 09:28 AM

@samjudson, mrame, Martin Honnen...I do get the same exact error message.
This is from an XML file that comes from a publisher and I cannot change the xml file or the DTD. I did try to change art to ART, it did not work.

Is there any other way to solve this issue.

Thanks again for the help.!!!
Neha

nehap8 · October 13th, 2011, 09:48 AM

Another similar example, here i don't get any error, but no output is displayed when the xml has DTD. But when the DTD is removed i get the "jid" tag element value.

XML with DTD:

<?xml version="1.0" encoding="utf-8"?><!DOCTYPE simple-article PUBLIC "-//ES//DTD journal article DTD version 5.1.0//EN//XML" "http://schema.elsevier.com/dtds/document/fulltext/warehouse/art510/art510.dtd"><simple-article version="5.1" docsubtype="abs"><item-info><jid>YDBIO</jid></item-info></simple-article>

XML without DTD:

<?xml version="1.0" encoding="utf-8"?><simple-article version="5.1" docsubtype="abs"><item-info><jid>YDBIO</jid></item-info></simple-article>

XSL:

<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns="http://www.w3.org/TR/REC-html40" >
<xsl:output method="html" encoding="UTF8" />
<xsl:strip-space elements="*"/>

<xsl:template match="/">
<html>
<head><title>Hello</title></head>
<body>JID:
<xsl:value-of select="/simple-article/item-info/jid"/>
</body></html>
</xsl:template>
</xsl:stylesheet>

Thanks,
Neha

mhkay · October 13th, 2011, 10:58 AM

The DTD has this line in it:

xmlns CDATA #FIXED %ESJA.xmlns;

This means that when the XML parser processes the file using the DTD, an xmlns="...." attribute is added to the outermost element. This has the effect of putting all unprefixed element names in a namespace, which means you have to change your XSLT code so that it matches names in that namespace.

People who design DTDs like this think they are being really smart by saving the XML author the trouble of adding a namespace declaration. I'm sure if their bosses realised the trouble that they cause to consumers of the document by hiding the fact that it's in a namespace, they would be sacked and lose their pension rights.

nehap8 · October 13th, 2011, 11:14 AM

Thanks a lot for your explanation. I am very new to XML and XSLT, please could you let me know where to look for the namespace information to reference the tags correctly.

Please excuse me if the question is naive.

PS: in one of the publisher xslt for I found, the simple-article tag is referenced as es:article. I am not sure from where to get this information.

Also with my first example, would you know why I am getting that error.

Thanks,
Neha

Martin Honnen · October 13th, 2011, 11:27 AM

The namespace name is declared as an entity in the DTD, it is http://www.elsevier.com/xml/ja/dtd so you need to change your stylesheet code to

Code:

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"  xmlns:df="http://www.elsevier.com/xml/ja/dtd" exclude-result-prefixes="df" version="1.0">
<xsl:output method="html" encoding="UTF8" />
<xsl:strip-space elements="*"/>

<xsl:template match="/">
<html>
<head><title>Hello</title></head>
<body><b>JID:</b>
<xsl:value-of select="/df:simple-article/df:item-info/df:jid"/>
</body></html>
</xsl:template>
</xsl:stylesheet>

nehap8 · October 13th, 2011, 11:33 AM

Thanks a ton that works..!!

Any comments on what i could do to fix the first example would be greatly appreciated.

XML with DTD:

<!DOCTYPE art public "-//ES//DTD full length article DTD version 4.3.1//EN"[]><ART VERSION="4.3.1" JID="AOS" AID="392" DOCSUBTY="FLA" PII="S0361368202000302" DOI="10.1016/S0361-3682(02)00030-2"><COPYRIGHT TYPE="full-transfer" YR="2003">Elsevier Ltd</COPYRIGHT><FM><ATL>The colour of accountancy: examining the salience of race in a professionalisation project</ATL></FM></ART>

XML without DTD:

<ART VERSION="4.3.1" JID="AOS" AID="392" DOCSUBTY="FLA" PII="S0361368202000302" DOI="10.1016/S0361-3682(02)00030-2"><COPYRIGHT TYPE="full-transfer" YR="2003">Elsevier Ltd</COPYRIGHT><FM><ATL>The colour of accountancy: examining the salience of race in a professionalisation project</ATL></FM></ART>

XSL:

<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns="http://www.w3.org/TR/REC-html40" >
<xsl:output method="html" encoding="UTF8" />
<xsl:strip-space elements="*"/>

<xsl:template match="/">
<html>
<head><title>Hello</title></head>
<body>Title:
<xsl:value-of select="/ART/FM/ATL"/>
</body></html>
</xsl:template>
</xsl:stylesheet>

PS: I found this DTD on web http://www.info.sciverse.com/UserFil...d43/art431.dtd

Please let me know if can provide with more information to help identify the problem.

Thanks,
Neha