Re: [Monetdb-developers] Q: pathfinder - cdata

12 Jul 2007

      Thanks Sjoerd, Jens, that answers it.

Any suggestion how to achieve what I am really after?

I have an XML file with email addresses and names,
and want to output a text string with
  "Name" ,
  "Name" ,
  "Name" 

Now I use a web browser to convert <> into <>,
but that cannot be the intention of using XQuery for your data
management, could it?!

I found that
  http://www.gnu.org/software/qexo/Extensions.html
introduces a special function - but is not standard.

Would the answer lie in a different output mode?

The serialization page
(http://www.w3.org/TR/2003/WD-xslt-xquery-serialization-20030502/#N40063A)
states:
  The text output method outputs the data model by outputting the
string-value of every
  text node in the data model in document order without any escaping.

Any chance that MonetDB/XQ will support such a text output mode?

Cheers,

Arjen

On 12/07/07, Sjoerd Mullender  wrote:
...
On 07/12/2007 08:46 PM, Arjen P. de Vries wrote:
...
I have two followup questions then:
1.
should
<a><![CDATA[<sjoerd@acm.org>]]></a>
not leave the CDATA intact and not replace the < to < ?
Disclaimer: I am not very sure what should be correct.
http://www.w3.org/TR/2003/WD-xslt-xquery-serialization-20030502/
states
  Note:
  This is phrased to permit an implementor to provide an option that
attempts to preserve
  CDATA sections present in the source document.
CDATA is CDATA, no matter the representation.  In both cases the content
of the <a> element is CDATA, it's just encoded differently.  I doubt
that there is a way for MonetDB/XQuery to find out which encoding was used.
...
2.
Should
xquery><![CDATA[<sjoerd@acm.org>]]></a>
more>MAPI  = monetdb@localhost:50000
QUERY = <![CDATA[<sjoerd@acm.org>]]></a>
ERROR = !parse error: syntax error, unexpected 
also have been allowed - a bit weird if it is allowed inside another element?
I don't know enough about XQuery, but my guess is: no.
When you look at the XQuery grammar
(http://www.w3.org/TR/xquery/#nt-bnf) you'll see that (after the
optional prologue stuff) the query consists of a list of comma-separated
ExprSingles, and that an ExprSingle is one of FLWORExpr, QuantifiedExpr,
TypeswitchExpr, IfExpr, OrExpr.  The only one (in a quick scan) that
doesn't have to start with a keyword is OrExpr in the guise of a
PathExpr.  And the only CDataSection (<![CDATA[...]]>) is inside a
<tag>...</tag> construct.
...
Cheers.
Arjen
On 12/07/07, Sjoerd Mullender  wrote:
...
Arjen P. de Vries wrote:
...
While
<a />
is accepted as a query,
<![CDATA[<]]>
is not.
!parse error: syntax error, unexpected 
Is that the expected behaviour?
Context: I try to output email addresses as "test " and failing
Arjen
This works:
xquery><a><![CDATA[<sjoerd@acm.org>]]></a>
more><>
<a><sjoerd@acm.org></a>
--
Sjoerd Mullender
--
Sjoerd Mullender
-- 
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