Can't get `cdata-section-elements` to work at all for XSLT output
Hello, First off, loving BaseX so far! Using it as the backend for an API I’m building. However, I’m running into an issue. I’m trying to transform my database XML into an RSS 2.0 feed. It’s mostly working fine, but I can’t output CDATA content at all, which I need to do for `content:encoded` elements. Specs: - BaseX 9.0.2 (started via basexserver script) - Saxon-HE 9.8.0.12J from Saxonica - java version "1.8.0_112" - basex 0.9.0 (NodeJS) - macOS Sierra 10.12.6 ### First Attempt I set `cdata-section-elements` in the XSLT. rss.xq: ``` xquery version "3.0"; declare option output:omit-xml-declaration "no"; let $in := <root> <child>hello</child> </root> let $style := doc( 'rss.xslt' ) return xslt:transform( $in, $style ) ``` rss.xslt: ``` <?xml version="1.0" encoding="UTF-8"?> <xsl:transform version="3.0" xmlns="http://backend.userland.com/rss2" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:content="http://purl.org/rss/1.0/modules/content/"
<xsl:output omit-xml-declaration="no" cdata-section-elements="content:encoded" /> <xsl:template match="/"> <rss version="2.0"> <content:encoded>hi</content:encoded> <content:encoded><xsl:text>howdy</xsl:text></content:encoded> <content:encoded><xsl:value-of select="//child" /></content:encoded> </rss> </xsl:template> </xsl:transform> ``` Result: ``` <?xml version="1.0" encoding="UTF-8"?> <rss xmlns="http://backend.userland.com/rss2" xmlns:content="http://purl.org/rss/1.0/modules/content/" version="2.0"> <content:encoded>hi</content:encoded> <content:encoded>howdy</content:encoded> <content:encoded>hello</content:encoded> </rss> ``` No CDATA sections. ### Second Attempt I set `cdata-section-elements` in the XQuery. rss.xq: ``` xquery version "3.0"; declare namespace content = "http://purl.org/rss/1.0/modules/content/"; declare option output:omit-xml-declaration "no"; declare option output:cdata-section-elements "content:encoded"; let $in := <root> <child>hello</child> </root> let $style := doc( 'rss.xslt' ) return xslt:transform( $in, $style ) ``` rss.xslt: [Unchanged] Result: [XPST0081] No namespace declared for 'content:encoded'. Clearly I declared the namespace two lines up. This looks like a bug to me, but any help appreciated if I’ve missed a step here. Thanks, Hugh
Hi Hugh, Welcome to the list. If you want to return the Saxon result as-is, you could try to use xslt:transform-text instead of xslt:transform. I’ll have a closer look at your second attempt next day. Best, Christian Hugh Guiney <hugh.guiney@gmail.com> schrieb am Mi., 1. Aug. 2018, 21:17:
Hello,
First off, loving BaseX so far! Using it as the backend for an API I’m building. However, I’m running into an issue. I’m trying to transform my database XML into an RSS 2.0 feed. It’s mostly working fine, but I can’t output CDATA content at all, which I need to do for `content:encoded` elements.
Specs:
- BaseX 9.0.2 (started via basexserver script) - Saxon-HE 9.8.0.12J from Saxonica - java version "1.8.0_112" - basex 0.9.0 (NodeJS) - macOS Sierra 10.12.6
### First Attempt
I set `cdata-section-elements` in the XSLT.
rss.xq: ``` xquery version "3.0"; declare option output:omit-xml-declaration "no";
let $in := <root> <child>hello</child> </root> let $style := doc( 'rss.xslt' ) return xslt:transform( $in, $style ) ```
rss.xslt: ``` <?xml version="1.0" encoding="UTF-8"?> <xsl:transform version="3.0" xmlns="http://backend.userland.com/rss2" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:content="http://purl.org/rss/1.0/modules/content/"
<xsl:output omit-xml-declaration="no" cdata-section-elements="content:encoded" /> <xsl:template match="/"> <rss version="2.0"> <content:encoded>hi</content:encoded> <content:encoded><xsl:text>howdy</xsl:text></content:encoded> <content:encoded><xsl:value-of select="//child" /></content:encoded> </rss> </xsl:template> </xsl:transform> ```
Result: ``` <?xml version="1.0" encoding="UTF-8"?> <rss xmlns="http://backend.userland.com/rss2" xmlns:content="http://purl.org/rss/1.0/modules/content/" version="2.0"> <content:encoded>hi</content:encoded> <content:encoded>howdy</content:encoded> <content:encoded>hello</content:encoded> </rss> ```
No CDATA sections.
### Second Attempt
I set `cdata-section-elements` in the XQuery.
rss.xq: ``` xquery version "3.0"; declare namespace content = "http://purl.org/rss/1.0/modules/content/"; declare option output:omit-xml-declaration "no"; declare option output:cdata-section-elements "content:encoded";
let $in := <root> <child>hello</child> </root> let $style := doc( 'rss.xslt' ) return xslt:transform( $in, $style ) ```
rss.xslt: [Unchanged]
Result: [XPST0081] No namespace declared for 'content:encoded'.
Clearly I declared the namespace two lines up.
This looks like a bug to me, but any help appreciated if I’ve missed a step here.
Thanks, Hugh
Hi Hugh, The second version where you specify the serialization options in XQuery works for me (BaseX GUI 8.6.5 with Saxon PE 9.6.0.7): <?xml version="1.0" encoding="UTF-8"?> <rss xmlns="http://backend.userland.com/rss2" xmlns:content="http://purl.org/rss/1.0/modules/content/" version="2.0"> <content:encoded><![CDATA[hi]]></content:encoded> <content:encoded><![CDATA[howdy]]></content:encoded> <content:encoded/> </rss> The first version cannot generate CDATA sections since the XSLT processor is not serializing anything; it’s the XQuery processor that serializes the result. The error that you are seeing, XPST0081, would be generated if there were no namespace declaration for the prefix 'content', maybe caused by an indistinguishable look-alike non-ASCII character in 'content'. Doesn’t seem to be the case. Maybe this is a bug that is specific to BaseX 9? Gerrit On 01.08.2018 21:17, Hugh Guiney wrote:
Hello,
First off, loving BaseX so far! Using it as the backend for an API I’m building. However, I’m running into an issue. I’m trying to transform my database XML into an RSS 2.0 feed. It’s mostly working fine, but I can’t output CDATA content at all, which I need to do for `content:encoded` elements.
Specs:
- BaseX 9.0.2 (started via basexserver script) - Saxon-HE 9.8.0.12J from Saxonica - java version "1.8.0_112" - basex 0.9.0 (NodeJS) - macOS Sierra 10.12.6
### First Attempt
I set `cdata-section-elements` in the XSLT.
rss.xq: ``` xquery version "3.0"; declare option output:omit-xml-declaration "no";
let $in := <root> <child>hello</child> </root> let $style := doc( 'rss.xslt' ) return xslt:transform( $in, $style ) ```
rss.xslt: ``` <?xml version="1.0" encoding="UTF-8"?> <xsl:transform version="3.0" xmlns="http://backend.userland.com/rss2" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:content="http://purl.org/rss/1.0/modules/content/"
<xsl:output omit-xml-declaration="no" cdata-section-elements="content:encoded" /> <xsl:template match="/"> <rss version="2.0"> <content:encoded>hi</content:encoded> <content:encoded><xsl:text>howdy</xsl:text></content:encoded> <content:encoded><xsl:value-of select="//child" /></content:encoded> </rss> </xsl:template> </xsl:transform> ```
Result: ``` <?xml version="1.0" encoding="UTF-8"?> <rss xmlns="http://backend.userland.com/rss2" xmlns:content="http://purl.org/rss/1.0/modules/content/" version="2.0"> <content:encoded>hi</content:encoded> <content:encoded>howdy</content:encoded> <content:encoded>hello</content:encoded> </rss> ```
No CDATA sections.
### Second Attempt
I set `cdata-section-elements` in the XQuery.
rss.xq: ``` xquery version "3.0"; declare namespace content = "http://purl.org/rss/1.0/modules/content/"; declare option output:omit-xml-declaration "no"; declare option output:cdata-section-elements "content:encoded";
let $in := <root> <child>hello</child> </root> let $style := doc( 'rss.xslt' ) return xslt:transform( $in, $style ) ```
rss.xslt: [Unchanged]
Result: [XPST0081] No namespace declared for 'content:encoded'.
Clearly I declared the namespace two lines up.
This looks like a bug to me, but any help appreciated if I’ve missed a step here.
Thanks, Hugh
Thanks, Gerrit, for testing the query with BaseX 8.6.5. I just tried 9.0.2 and 9.1 beta, and it runs successfully on my machine as well. The result: <?xml version="1.0" encoding="UTF-8"?> <rss xmlns="http://backend.userland.com/rss2" xmlns:content="http://purl.org/rss/1.0/modules/content/" version="2.0"> <content:encoded><![CDATA[hi]]></content:encoded> <content:encoded><![CDATA[howdy]]></content:encoded> <content:encoded><![CDATA[hello]]></content:encoded> </rss> I get the reported error message only if I remove the namespace declaration from the query prolog: [XPST0081] No namespace declared for 'content:encoded'. On Wed, Aug 1, 2018 at 9:50 PM Imsieke, Gerrit, le-tex <gerrit.imsieke@le-tex.de> wrote:
Hi Hugh,
The second version where you specify the serialization options in XQuery works for me (BaseX GUI 8.6.5 with Saxon PE 9.6.0.7):
<?xml version="1.0" encoding="UTF-8"?> <rss xmlns="http://backend.userland.com/rss2" xmlns:content="http://purl.org/rss/1.0/modules/content/" version="2.0"> <content:encoded><![CDATA[hi]]></content:encoded> <content:encoded><![CDATA[howdy]]></content:encoded> <content:encoded/> </rss>
The first version cannot generate CDATA sections since the XSLT processor is not serializing anything; it’s the XQuery processor that serializes the result.
The error that you are seeing, XPST0081, would be generated if there were no namespace declaration for the prefix 'content', maybe caused by an indistinguishable look-alike non-ASCII character in 'content'. Doesn’t seem to be the case. Maybe this is a bug that is specific to BaseX 9?
Gerrit
On 01.08.2018 21:17, Hugh Guiney wrote:
Hello,
First off, loving BaseX so far! Using it as the backend for an API I’m building. However, I’m running into an issue. I’m trying to transform my database XML into an RSS 2.0 feed. It’s mostly working fine, but I can’t output CDATA content at all, which I need to do for `content:encoded` elements.
Specs:
- BaseX 9.0.2 (started via basexserver script) - Saxon-HE 9.8.0.12J from Saxonica - java version "1.8.0_112" - basex 0.9.0 (NodeJS) - macOS Sierra 10.12.6
### First Attempt
I set `cdata-section-elements` in the XSLT.
rss.xq: ``` xquery version "3.0"; declare option output:omit-xml-declaration "no";
let $in := <root> <child>hello</child> </root> let $style := doc( 'rss.xslt' ) return xslt:transform( $in, $style ) ```
rss.xslt: ``` <?xml version="1.0" encoding="UTF-8"?> <xsl:transform version="3.0" xmlns="http://backend.userland.com/rss2" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:content="http://purl.org/rss/1.0/modules/content/"
<xsl:output omit-xml-declaration="no" cdata-section-elements="content:encoded" /> <xsl:template match="/"> <rss version="2.0"> <content:encoded>hi</content:encoded> <content:encoded><xsl:text>howdy</xsl:text></content:encoded> <content:encoded><xsl:value-of select="//child" /></content:encoded> </rss> </xsl:template> </xsl:transform> ```
Result: ``` <?xml version="1.0" encoding="UTF-8"?> <rss xmlns="http://backend.userland.com/rss2" xmlns:content="http://purl.org/rss/1.0/modules/content/" version="2.0"> <content:encoded>hi</content:encoded> <content:encoded>howdy</content:encoded> <content:encoded>hello</content:encoded> </rss> ```
No CDATA sections.
### Second Attempt
I set `cdata-section-elements` in the XQuery.
rss.xq: ``` xquery version "3.0"; declare namespace content = "http://purl.org/rss/1.0/modules/content/"; declare option output:omit-xml-declaration "no"; declare option output:cdata-section-elements "content:encoded";
let $in := <root> <child>hello</child> </root> let $style := doc( 'rss.xslt' ) return xslt:transform( $in, $style ) ```
rss.xslt: [Unchanged]
Result: [XPST0081] No namespace declared for 'content:encoded'.
Clearly I declared the namespace two lines up.
This looks like a bug to me, but any help appreciated if I’ve missed a step here.
Thanks, Hugh
Thanks for testing Gerrit, that's good to know. Sounds like a regression then. Shall I go ahead and file this on Github or does it need further confirmation? Christian, your suggestion seems to work around the issue; the CDATA sections do come in that way. Except, all the elements get sent back entity-escaped for some reason. I have to manually reverse it back into XML using `result.replace( />/gi, '>' ).replace( /</gi, '<' )` in JavaScript. Not sure if that is a separate issue or expected behavior. On Wed, Aug 1, 2018 at 2:50 PM, Imsieke, Gerrit, le-tex <gerrit.imsieke@le-tex.de> wrote:
Hi Hugh,
The second version where you specify the serialization options in XQuery works for me (BaseX GUI 8.6.5 with Saxon PE 9.6.0.7):
<?xml version="1.0" encoding="UTF-8"?> <rss xmlns="http://backend.userland.com/rss2" xmlns:content="http://purl.org/rss/1.0/modules/content/" version="2.0"> <content:encoded><![CDATA[hi]]></content:encoded> <content:encoded><![CDATA[howdy]]></content:encoded> <content:encoded/> </rss>
The first version cannot generate CDATA sections since the XSLT processor is not serializing anything; it’s the XQuery processor that serializes the result.
The error that you are seeing, XPST0081, would be generated if there were no namespace declaration for the prefix 'content', maybe caused by an indistinguishable look-alike non-ASCII character in 'content'. Doesn’t seem to be the case. Maybe this is a bug that is specific to BaseX 9?
Gerrit
On 01.08.2018 21:17, Hugh Guiney wrote:
Hello,
First off, loving BaseX so far! Using it as the backend for an API I’m building. However, I’m running into an issue. I’m trying to transform my database XML into an RSS 2.0 feed. It’s mostly working fine, but I can’t output CDATA content at all, which I need to do for `content:encoded` elements.
Specs:
- BaseX 9.0.2 (started via basexserver script) - Saxon-HE 9.8.0.12J from Saxonica - java version "1.8.0_112" - basex 0.9.0 (NodeJS) - macOS Sierra 10.12.6
### First Attempt
I set `cdata-section-elements` in the XSLT.
rss.xq: ``` xquery version "3.0"; declare option output:omit-xml-declaration "no";
let $in := <root> <child>hello</child> </root> let $style := doc( 'rss.xslt' ) return xslt:transform( $in, $style ) ```
rss.xslt: ``` <?xml version="1.0" encoding="UTF-8"?> <xsl:transform version="3.0" xmlns="http://backend.userland.com/rss2" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:content="http://purl.org/rss/1.0/modules/content/"
<xsl:output omit-xml-declaration="no" cdata-section-elements="content:encoded" /> <xsl:template match="/"> <rss version="2.0"> <content:encoded>hi</content:encoded> <content:encoded><xsl:text>howdy</xsl:text></content:encoded> <content:encoded><xsl:value-of select="//child" /></content:encoded> </rss> </xsl:template> </xsl:transform> ```
Result: ``` <?xml version="1.0" encoding="UTF-8"?> <rss xmlns="http://backend.userland.com/rss2" xmlns:content="http://purl.org/rss/1.0/modules/content/" version="2.0"> <content:encoded>hi</content:encoded> <content:encoded>howdy</content:encoded> <content:encoded>hello</content:encoded> </rss> ```
No CDATA sections.
### Second Attempt
I set `cdata-section-elements` in the XQuery.
rss.xq: ``` xquery version "3.0"; declare namespace content = "http://purl.org/rss/1.0/modules/content/"; declare option output:omit-xml-declaration "no"; declare option output:cdata-section-elements "content:encoded";
let $in := <root> <child>hello</child> </root> let $style := doc( 'rss.xslt' ) return xslt:transform( $in, $style ) ```
rss.xslt: [Unchanged]
Result: [XPST0081] No namespace declared for 'content:encoded'.
Clearly I declared the namespace two lines up.
This looks like a bug to me, but any help appreciated if I’ve missed a step here.
Thanks, Hugh
Hugh, As Gerrit mentioned, the issue you have encountered is due to the xslt:transform function returning, essentially, a parsed XML document, so the serialization controls that are declared in the XSLT are not being used. If you want the serialized output of the XSLT you can use the xslt:transform-text function. For example: let $in := <root><child>hello</child></root> let $xslt := doc('rss.xslt') let $out := xslt:transform-text($in, $xslt) return file:write-text('out.xml', $out) I hope this helps. Vincent http://docs.basex.org/wiki/XSLT_Module#xslt:transform-text http://docs.basex.org/wiki/File_Module#file:write-text ________________________________ From: BaseX-Talk <basex-talk-bounces@mailman.uni-konstanz.de> on behalf of Hugh Guiney <hugh.guiney@gmail.com> Sent: Wednesday, August 1, 2018 5:47:55 PM To: Imsieke, Gerrit, le-tex Cc: basex-talk@mailman.uni-konstanz.de Subject: Re: [basex-talk] Can't get `cdata-section-elements` to work at all for XSLT output Thanks for testing Gerrit, that's good to know. Sounds like a regression then. Shall I go ahead and file this on Github or does it need further confirmation? Christian, your suggestion seems to work around the issue; the CDATA sections do come in that way. Except, all the elements get sent back entity-escaped for some reason. I have to manually reverse it back into XML using `result.replace( />/gi, '>' ).replace( /</gi, '<' )` in JavaScript. Not sure if that is a separate issue or expected behavior. On Wed, Aug 1, 2018 at 2:50 PM, Imsieke, Gerrit, le-tex <gerrit.imsieke@le-tex.de> wrote:
Hi Hugh,
The second version where you specify the serialization options in XQuery works for me (BaseX GUI 8.6.5 with Saxon PE 9.6.0.7<http://9.6.0.7>:
<?xml version="1.0" encoding="UTF-8"?> <rss xmlns="http://backend.userland.com/rss2<http://backend.userland.com/rss2>" xmlns:content="http://purl.org/rss/1.0/modules/content/<http://purl.org/rss/1.0/modules/content/>" version="2.0"> <content:encoded><![CDATA[hi]]></content:encoded> <content:encoded><![CDATA[howdy]]></content:encoded> <content:encoded/> </rss>
The first version cannot generate CDATA sections since the XSLT processor is not serializing anything; it’s the XQuery processor that serializes the result.
The error that you are seeing, XPST0081, would be generated if there were no namespace declaration for the prefix 'content', maybe caused by an indistinguishable look-alike non-ASCII character in 'content'. Doesn’t seem to be the case. Maybe this is a bug that is specific to BaseX 9?
Gerrit
On 01.08.2018 21:17, Hugh Guiney wrote:
Hello,
First off, loving BaseX so far! Using it as the backend for an API I’m building. However, I’m running into an issue. I’m trying to transform my database XML into an RSS 2.0 feed. It’s mostly working fine, but I can’t output CDATA content at all, which I need to do for `content:encoded` elements.
Specs:
- BaseX 9.0.2 (started via basexserver script) - Saxon-HE 9.8.0.12J from Saxonica - java version "1.8.0_112" - basex 0.9.0 (NodeJS) - macOS Sierra 10.12.6
### First Attempt
I set `cdata-section-elements` in the XSLT.
rss.xq: ``` xquery version "3.0"; declare option output:omit-xml-declaration "no";
let $in := <root> <child>hello</child> </root> let $style := doc( 'rss.xslt' ) return xslt:transform( $in, $style ) ```
rss.xslt: ``` <?xml version="1.0" encoding="UTF-8"?> <xsl:transform version="3.0" xmlns="http://backend.userland.com/rss2<http://backend.userland.com/rss2>" xmlns:xsl="http://www.w3.org/1999/XSL/Transform<http://www.w3.org/1999/XSL/Transform>" xmlns:content="http://purl.org/rss/1.0/modules/content/<http://purl.org/rss/1.0/modules/content/>"
<xsl:output omit-xml-declaration="no" cdata-section-elements="content:encoded" /> <xsl:template match="/"> <rss version="2.0"> <content:encoded>hi</content:encoded> <content:encoded><xsl:text>howdy</xsl:text></content:encoded> <content:encoded><xsl:value-of select="//child" /></content:encoded> </rss> </xsl:template> </xsl:transform> ```
Result: ``` <?xml version="1.0" encoding="UTF-8"?> <rss xmlns="http://backend.userland.com/rss2<http://backend.userland.com/rss2>" xmlns:content="http://purl.org/rss/1.0/modules/content/<http://purl.org/rss/1.0/modules/content/>" version="2.0"> <content:encoded>hi</content:encoded> <content:encoded>howdy</content:encoded> <content:encoded>hello</content:encoded> </rss> ```
No CDATA sections.
### Second Attempt
I set `cdata-section-elements` in the XQuery.
rss.xq: ``` xquery version "3.0"; declare namespace content = "http://purl.org/rss/1.0/modules/content/<http://purl.org/rss/1.0/modules/content/>"; declare option output:omit-xml-declaration "no"; declare option output:cdata-section-elements "content:encoded";
let $in := <root> <child>hello</child> </root> let $style := doc( 'rss.xslt' ) return xslt:transform( $in, $style ) ```
rss.xslt: [Unchanged]
Result: [XPST0081] No namespace declared for 'content:encoded'.
Clearly I declared the namespace two lines up.
This looks like a bug to me, but any help appreciated if I’ve missed a step here.
Thanks, Hugh
Hi Vincent, I understand, but did you see the details of my second attempt? The serialization controls didn’t work when specified in XQuery either. Which they should have, right? I mean, why else would BaseX provide XSLT options like `output:omit-xml-declaration` if you’re not supposed to use them? And why do the same serialization options in XQuery work in BaseX 8 but not BaseX 9? If I was to do further manipulation of the XSLT output in XQuery instead of just immediately sending it to the browser or saving it to a file, why would I want the result to come back as an escaped string instead of real nodes? My first attempt may have been the wrong approach for what I wanted to do—in which case I would suggest a note in the documentation, since it isn’t obvious compared to the usual method of specifying `xsl:output`—but my second attempt gives me an error for “not declaring a namespace” that I have clearly declared. That seems like a bug, no? - Hugh On Wed, Aug 1, 2018 at 9:57 PM, Lizzi, Vincent <Vincent.Lizzi@taylorandfrancis.com> wrote:
Hugh,
As Gerrit mentioned, the issue you have encountered is due to the xslt:transform function returning, essentially, a parsed XML document, so the serialization controls that are declared in the XSLT are not being used. If you want the serialized output of the XSLT you can use the xslt:transform-text function. For example:
let $in := <root><child>hello</child></root>
let $xslt := doc('rss.xslt')
let $out := xslt:transform-text($in, $xslt)
return file:write-text('out.xml', $out)
I hope this helps.
Vincent
http://docs.basex.org/wiki/XSLT_Module#xslt:transform-text
http://docs.basex.org/wiki/File_Module#file:write-text
________________________________ From: BaseX-Talk <basex-talk-bounces@mailman.uni-konstanz.de> on behalf of Hugh Guiney <hugh.guiney@gmail.com> Sent: Wednesday, August 1, 2018 5:47:55 PM To: Imsieke, Gerrit, le-tex Cc: basex-talk@mailman.uni-konstanz.de Subject: Re: [basex-talk] Can't get `cdata-section-elements` to work at all for XSLT output
Thanks for testing Gerrit, that's good to know. Sounds like a regression then. Shall I go ahead and file this on Github or does it need further confirmation?
Christian, your suggestion seems to work around the issue; the CDATA sections do come in that way. Except, all the elements get sent back entity-escaped for some reason. I have to manually reverse it back into XML using `result.replace( />/gi, '>' ).replace( /</gi, '<' )` in JavaScript. Not sure if that is a separate issue or expected behavior.
On Wed, Aug 1, 2018 at 2:50 PM, Imsieke, Gerrit, le-tex <gerrit.imsieke@le-tex.de> wrote:
Hi Hugh,
The second version where you specify the serialization options in XQuery works for me (BaseX GUI 8.6.5 with Saxon PE 9.6.0.7:
<?xml version="1.0" encoding="UTF-8"?> <rss xmlns="http://backend.userland.com/rss2" xmlns:content="http://purl.org/rss/1.0/modules/content/" version="2.0"> <content:encoded><![CDATA[hi]]></content:encoded> <content:encoded><![CDATA[howdy]]></content:encoded> <content:encoded/> </rss>
The first version cannot generate CDATA sections since the XSLT processor is not serializing anything; it’s the XQuery processor that serializes the result.
The error that you are seeing, XPST0081, would be generated if there were no namespace declaration for the prefix 'content', maybe caused by an indistinguishable look-alike non-ASCII character in 'content'. Doesn’t seem to be the case. Maybe this is a bug that is specific to BaseX 9?
Gerrit
On 01.08.2018 21:17, Hugh Guiney wrote:
Hello,
First off, loving BaseX so far! Using it as the backend for an API I’m building. However, I’m running into an issue. I’m trying to transform my database XML into an RSS 2.0 feed. It’s mostly working fine, but I can’t output CDATA content at all, which I need to do for `content:encoded` elements.
Specs:
- BaseX 9.0.2 (started via basexserver script) - Saxon-HE 9.8.0.12J from Saxonica - java version "1.8.0_112" - basex 0.9.0 (NodeJS) - macOS Sierra 10.12.6
### First Attempt
I set `cdata-section-elements` in the XSLT.
rss.xq: ``` xquery version "3.0"; declare option output:omit-xml-declaration "no";
let $in := <root> <child>hello</child> </root> let $style := doc( 'rss.xslt' ) return xslt:transform( $in, $style ) ```
rss.xslt: ``` <?xml version="1.0" encoding="UTF-8"?> <xsl:transform version="3.0" xmlns="http://backend.userland.com/rss2" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:content="http://purl.org/rss/1.0/modules/content/"
<xsl:output omit-xml-declaration="no" cdata-section-elements="content:encoded" /> <xsl:template match="/"> <rss version="2.0"> <content:encoded>hi</content:encoded> <content:encoded><xsl:text>howdy</xsl:text></content:encoded> <content:encoded><xsl:value-of select="//child" /></content:encoded> </rss> </xsl:template> </xsl:transform> ```
Result: ``` <?xml version="1.0" encoding="UTF-8"?> <rss xmlns="http://backend.userland.com/rss2" xmlns:content="http://purl.org/rss/1.0/modules/content/" version="2.0"> <content:encoded>hi</content:encoded> <content:encoded>howdy</content:encoded> <content:encoded>hello</content:encoded> </rss> ```
No CDATA sections.
### Second Attempt
I set `cdata-section-elements` in the XQuery.
rss.xq: ``` xquery version "3.0"; declare namespace content = "http://purl.org/rss/1.0/modules/content/"; declare option output:omit-xml-declaration "no"; declare option output:cdata-section-elements "content:encoded";
let $in := <root> <child>hello</child> </root> let $style := doc( 'rss.xslt' ) return xslt:transform( $in, $style ) ```
rss.xslt: [Unchanged]
Result: [XPST0081] No namespace declared for 'content:encoded'.
Clearly I declared the namespace two lines up.
This looks like a bug to me, but any help appreciated if I’ve missed a step here.
Thanks, Hugh
Hi Hugh,
I understand, but did you see the details of my second attempt? The serialization controls didn’t work when specified in XQuery either.
I don’t get XPST0081 for this query (as indicated in a previous reply of mine). Could you please clarify first if the unchanged query you supplied via your first mail really fails on your machine? If no (i.e., if it runs successfully with the declared namespace), please give us more details on how to trigger this behavior. I get the following result with both 9.0.2 and 9.1 beta when running the query of your second attempt in the BaseX GUI or on command line: <?xml version="1.0" encoding="UTF-8"?> <rss xmlns="http://backend.userland.com/rss2" xmlns:content="http://purl.org/rss/1.0/modules/content/" version="2.0"> <content:encoded><![CDATA[hi]]></content:encoded> <content:encoded><![CDATA[howdy]]></content:encoded> <content:encoded><![CDATA[hello]]></content:encoded> </rss> Could you please try what result you get if you run the query directly in the GUI or on command-line? If the result is correct, we can proceed further. If it’s already wrong, we may need to compare our BaseX configurations (in that case, we should start with a newly downloaded instance of one of our distributions). And if the problem persists, maybe we could even simplify your example and try the following query: declare option output:cdata-section-elements "xml"; <xml>A</xml> Does it yield different results with BaseX 8 and 9 on your machine?
And why do the same serialization options in XQuery work in BaseX 8 but not BaseX 9?
Just to be sure: Is this already a fact (did you compare the versions by yourself), or is it still a guess?
why would I want the result to come back as an escaped string instead of real nodes?
Same here: With xquery:transform-text, or with Vincent’s query, nothing will be escaped on my machine. The result is pretty similar to the result of your second attempt, it’s only the indentation that differs slightly. Best, Christian
Hi Hugh, Did you see Christian’s reply, archived at https://mailman.uni-konstanz.de/pipermail/basex-talk/2018-August/013490.html? He essentially said that, for your second approach, he saw the same behavior on BaseX 9.x as I saw on 8.6.5. So there doesn’t seem to be a regression. I agree with you that xslt:transform-text() is not a solution. Gerrit On 01.08.2018 23:47, Hugh Guiney wrote:
Thanks for testing Gerrit, that's good to know. Sounds like a regression then. Shall I go ahead and file this on Github or does it need further confirmation?
Christian, your suggestion seems to work around the issue; the CDATA sections do come in that way. Except, all the elements get sent back entity-escaped for some reason. I have to manually reverse it back into XML using `result.replace( />/gi, '>' ).replace( /</gi, '<' )` in JavaScript. Not sure if that is a separate issue or expected behavior.
On Wed, Aug 1, 2018 at 2:50 PM, Imsieke, Gerrit, le-tex <gerrit.imsieke@le-tex.de> wrote:
Hi Hugh,
The second version where you specify the serialization options in XQuery works for me (BaseX GUI 8.6.5 with Saxon PE 9.6.0.7):
<?xml version="1.0" encoding="UTF-8"?> <rss xmlns="http://backend.userland.com/rss2" xmlns:content="http://purl.org/rss/1.0/modules/content/" version="2.0"> <content:encoded><![CDATA[hi]]></content:encoded> <content:encoded><![CDATA[howdy]]></content:encoded> <content:encoded/> </rss>
The first version cannot generate CDATA sections since the XSLT processor is not serializing anything; it’s the XQuery processor that serializes the result.
The error that you are seeing, XPST0081, would be generated if there were no namespace declaration for the prefix 'content', maybe caused by an indistinguishable look-alike non-ASCII character in 'content'. Doesn’t seem to be the case. Maybe this is a bug that is specific to BaseX 9?
Gerrit
On 01.08.2018 21:17, Hugh Guiney wrote:
Hello,
First off, loving BaseX so far! Using it as the backend for an API I’m building. However, I’m running into an issue. I’m trying to transform my database XML into an RSS 2.0 feed. It’s mostly working fine, but I can’t output CDATA content at all, which I need to do for `content:encoded` elements.
Specs:
- BaseX 9.0.2 (started via basexserver script) - Saxon-HE 9.8.0.12J from Saxonica - java version "1.8.0_112" - basex 0.9.0 (NodeJS) - macOS Sierra 10.12.6
### First Attempt
I set `cdata-section-elements` in the XSLT.
rss.xq: ``` xquery version "3.0"; declare option output:omit-xml-declaration "no";
let $in := <root> <child>hello</child> </root> let $style := doc( 'rss.xslt' ) return xslt:transform( $in, $style ) ```
rss.xslt: ``` <?xml version="1.0" encoding="UTF-8"?> <xsl:transform version="3.0" xmlns="http://backend.userland.com/rss2" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:content="http://purl.org/rss/1.0/modules/content/"
<xsl:output omit-xml-declaration="no" cdata-section-elements="content:encoded" /> <xsl:template match="/"> <rss version="2.0"> <content:encoded>hi</content:encoded> <content:encoded><xsl:text>howdy</xsl:text></content:encoded> <content:encoded><xsl:value-of select="//child" /></content:encoded> </rss> </xsl:template> </xsl:transform> ```
Result: ``` <?xml version="1.0" encoding="UTF-8"?> <rss xmlns="http://backend.userland.com/rss2" xmlns:content="http://purl.org/rss/1.0/modules/content/" version="2.0"> <content:encoded>hi</content:encoded> <content:encoded>howdy</content:encoded> <content:encoded>hello</content:encoded> </rss> ```
No CDATA sections.
### Second Attempt
I set `cdata-section-elements` in the XQuery.
rss.xq: ``` xquery version "3.0"; declare namespace content = "http://purl.org/rss/1.0/modules/content/"; declare option output:omit-xml-declaration "no"; declare option output:cdata-section-elements "content:encoded";
let $in := <root> <child>hello</child> </root> let $style := doc( 'rss.xslt' ) return xslt:transform( $in, $style ) ```
rss.xslt: [Unchanged]
Result: [XPST0081] No namespace declared for 'content:encoded'.
Clearly I declared the namespace two lines up.
This looks like a bug to me, but any help appreciated if I’ve missed a step here.
Thanks, Hugh
-- Gerrit Imsieke Geschäftsführer / Managing Director le-tex publishing services GmbH Weissenfelser Str. 84, 04229 Leipzig, Germany Phone +49 341 355356 110, Fax +49 341 355356 510 gerrit.imsieke@le-tex.de, http://www.le-tex.de Registergericht / Commercial Register: Amtsgericht Leipzig Registernummer / Registration Number: HRB 24930 Geschäftsführer / Managing Directors: Gerrit Imsieke, Svea Jelonek, Thomas Schmidt
participants (4)
-
Christian Grün -
Hugh Guiney -
Imsieke, Gerrit, le-tex -
Lizzi, Vincent