Well, it depends. I think most people keep attributes in the no namespace unless there is a convincing reason to use a different namespace. On the search side, it would depend on your content format and your business requirements, but doing global XPath on attributes (e.g., //@size) tends to be rare, so name collisions of attributes are generally less of a concern than element-name collisions.
Regards, James > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > Helen Chen > Sent: Wednesday, August 15, 2007 3:22 PM > To: General Mark Logic Developer Discussion > Subject: RE: [MarkLogic Dev General] xhtml loading question > > Thanks for explain it. > > Is it good habit to make sure all the attributes for the > element belong to the same namespace during loading? Or > otherwise maybe attributes without namespace are easier for searching? > > Helen > > >>> "James Clippinger" <[EMAIL PROTECTED]> > 08/15/07 3:06 PM > >>> >>> > Helen, default namespaces never apply to unprefixed > attributes; attributes without a prefix are always in the no > namespace. This is an XML specification (see > http://www.w3.org/TR/2006/REC-xml-names-20060816/#defaulting) > that has been carried through to XQuery. > > I don't know the reasoning behind that design decision by the > recommendation writers and I personally dislike the > differential treatment of elements vs. attributes, but it's > how the language works. > > Regards, > James > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Helen > > Chen > > Sent: Wednesday, August 15, 2007 2:35 PM > > To: General Mark Logic Developer Discussion > > Cc: Helen Chen > > Subject: RE: [MarkLogic Dev General] xhtml loading question > > > > Hi James, > > > > I'm interested in this topic and I have an question about the > > namespace for the > > attribute: > > > > At the data loading time, Dev declared namespace as > > "http://www.w3.org/1999/xhtml > > xdmp:document-insert("/content/htmlchk66.html", > > <html xmlns="http://www.w3.org/1999/xhtml"; xml:lang="en" > > lang="en"> <body> <meta name="org" content="abc-de" /> <meta > > name="product" content="electronics" /> <meta name="education" > > content="school" /> <meta name="test" > > content="answer123" /> </body> > > </html>) > > > > My understanding for namespace is: if you declare the namespace, > > unless you change it or it goes out of the scope, all the following > > elements and attributes belong to this namespace. > > > > But you mentioned that the attributes in Dev's data does > not have any > > namespace, I think I misunderstood the concept. Can you explain it > > more? > > > > Thanks, Helen > > > > > > > > >>> "James Clippinger" <[EMAIL PROTECTED]> > > 08/14/07 5:41 PM > > >>> >>> > > Dev, the syntax you used would associate the prefix "html" > > with the XHTML namespace; you could use it like this: > > > > declare namespace html="http://www.w3.org/1999/xhtml"; > > > > cts:search(xdmp:directory(('/'),"infinity"), > > cts:and-query((cts:element-attribute-value-query(xs:QName("htm > > l:meta"), > > xs:QName("name"), > > "org"),cts:element-attribute-value-query(xs:QName("html:meta"), > > xs:QName("content"), "abc-de")))) > > > > Now, you could use the "default element namespace" syntax to set the > > default: > > > > default element namespace="http://www.w3.org/1999/xhtml"; > > > > cts:search(xdmp:directory(('/'),"infinity"), > > cts:and-query((cts:element-attribute-value-query(xs:QName("meta"), > > xs:QName("name"), > > "org"),cts:element-attribute-value-query(xs:QName("meta"), > > xs:QName("content"), "abc-de")))) > > > > However, this will return no results in your example, because > > xs:QName() will, when given an unprefixed string, return > QNames in the > > default element namespace. This is the right thing for the QNames > > being used as elements, but it causes the attribute QNames not to > > match since they are in the no namespace. This version would work: > > > > default element namespace="http://www.w3.org/1999/xhtml"; > > declare namespace no-namespace="" > > > > cts:search(xdmp:directory(('/'),"infinity"), > > cts:and-query((cts:element-attribute-value-query(xs:QName("meta"), > > xs:QName("no-namespace:name"), > > "org"),cts:element-attribute-value-query(xs:QName("meta"), > > xs:QName("no-namespace:content"), "abc-de")))) > > > > I think the html-prefix form is more intuitive than this > one, but it > > is legal XQuery and will work just fine. > > > > Regards, > > James > > > > > > > > ________________________________ > > > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf > Of Devadoss > > P > > Sent: Tuesday, August 14, 2007 5:16 PM > > To: General Mark Logic Developer Discussion > > Subject: Re: [MarkLogic Dev General] xhtml loading question > > > > > > Thanks James, it's working. > > > > I couldn't understand, why declaring default namespace > is not working > > in this case (declare namespace html = > > "http://www.w3.org/1999/xhtml";). > > > > Is it because of xhtml namespace? > > > > Thanks, > > Dev > > > > > > > > > > On 8/14/07, James Clippinger <[EMAIL PROTECTED] > > > wrote: > > > > Dev, you need to include the XHTML namespace in > the element QNames > > you create for use in the cts:search() if you want the > query to match > > those elements. This would work: > > > > cts:search(xdmp:directory(('/'),"infinity"), > > cts:and-query((cts:element-attribute-value-query(fn:QName(" > > http://www.w3.org/1999/xhtml <http://www.w3.org/1999/xhtml> ", > > "meta"), xs:QName("name"), > > "org"),cts:element-attribute-value-query(fn:QName(" > > http://www.w3.org/1999/xhtml <http://www.w3.org/1999/xhtml> ", > > "meta"), xs:QName("content"), "abc-de")))) > > > > Note that the attribute QNames don't require > namespace URIs because, > > having not been prefixed in the original source, they are in the no > > namespace. If you wanted to use the fn:QName() function for > > consistency, this form also works: > > > > cts:search(xdmp:directory(('/'),"infinity"), > > cts:and-query((cts:element-attribute-value-query(fn:QName(" > > http://www.w3.org/1999/xhtml <http://www.w3.org/1999/xhtml> ", > > "meta"), fn:QName("", "name"), > > "org"),cts:element-attribute-value-query(fn:QName(" > > http://www.w3.org/1999/xhtml <http://www.w3.org/1999/xhtml> ", > > "meta"), fn:QName("", "content"), "abc-de")))) > > > > Regards, > > James > > > > > > ________________________________ > > > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf > Of Devadoss > > P > > Sent: Tuesday, August 14, 2007 4:49 PM > > > > To: General Mark Logic Developer Discussion > > Subject: Re: [MarkLogic Dev General] > xhtml loading question > > > > > > > > > > James, > > > > This is the query used to load the document, > > xdmp:document-insert("/content/htmlchk66.html", > > <html xmlns="http://www.w3.org/1999/xhtml " > > xml:lang="en" lang="en"> > > <body> > > <meta name="org" content="abc-de" /> > > <meta name="product" content="electronics" /> > > <meta name="education" content="school" /> > > <meta name="test" content="answer123" /> > > </body> > > </html>) > > > > and my cts query is > > cts:search(xdmp:directory(('/'),"infinity"), > > cts:and-query((cts:element-attribute-value-query(xs:QName("meta"), > > xs:QName("name"), > > "org"),cts:element-attribute-value-query(xs:QName("meta"), > > xs:QName("content"), "abc-de")))) > > > > This query returns result, if I load > > document without xmlns. > > > > Thanks, > > Dev > > > > > > On 8/14/07, James Clippinger > > <[EMAIL PROTECTED] > wrote: > > > > Dev, can you send the > > cts:search() call you're using for your search? > > > > Thanks, > > James > > > > > > ________________________________ > > > > From: > > [EMAIL PROTECTED] [mailto: > > [EMAIL PROTECTED] On Behalf Of Devadoss P > > Sent: Tuesday, August 14, 2007 4:33 PM > > To: General Mark Logic Developer > > Discussion > > Subject: Re: [MarkLogic Dev > > General] xhtml loading question > > > > > > > > James and Mike, > > > > How to resolve > > (xmlns="http://www.w3.org/1999/xhtml";) namespace conflict in > > xquery; I loaded html document (which has xmlns namespce > > defined) to MarkLogic and tried to query its element by using > > cts:search(), but it returns empty row. > > > > Can you help me to resolve > > namespace issue? > > > > Thanks, > > Dev > > > > > > On 8/14/07, Alex Rice > > <[EMAIL PROTECTED]> wrote: > > > > James and Michael: > > > > i had not even thought of namespaces. > > now I am getting nodes back and > > can use the declare namespace > > feature etc. Thank you both for > > responding. > > > > Alex Rice > > > > > > On 8/14/07, James Clippinger > > <[EMAIL PROTECTED] > wrote: > > > Alex, I'm not familiar with > > the XHTML created by Dreamweaver or UpCast, > > > but I suspect the XHTML > > elements both tools create are in the XHTML > > > namespace. Try this (keeping > > in mind the wildcard-namespace syntax may > > > be slow): > > > > > > > > doc("/SFI/Update/news/articletest2/test.xml")//*:p > > > > > > If it returns items, you can > > see which namespace each item is in and go > > > from there. > > > > > > Regards, > > > James > > > > > > > _______________________________________________ > > General mailing list > > [email protected] > > > > http://xqzone.com/mailman/listinfo/general > > > > > > > > > > > > _______________________________________________ > > General mailing list > > [email protected] > > > > http://xqzone.com/mailman/listinfo/general > > > > > > > > > > > > _______________________________________________ > > General mailing list > > [email protected] > > http://xqzone.com/mailman/listinfo/general > > > > > > > > > > _______________________________________________ > > General mailing list > > [email protected] > > http://xqzone.com/mailman/listinfo/general > > > _______________________________________________ > General mailing list > [email protected] > http://xqzone.com/mailman/listinfo/general > _______________________________________________ > General mailing list > [email protected] > http://xqzone.com/mailman/listinfo/general > _______________________________________________ General mailing list [email protected] http://xqzone.com/mailman/listinfo/general
