test if a namespace prefix is declared

On Tue, Feb 10, 2015 at 2:01 PM, Emmanuel Chateau <emchateau at laposte.net> wrote: > We wanna test if a function exists with fn:function-lookup > > As fn:function-lookup only takes QNames, in some cases the namespace isn’t declared. So unsurprisingly, we get an error FONS0004 No namespace declared for prefix ‘……’ > > Is there any way to test if the namespace is declared first ? > > Thanks a lot, and best regards ! > Emmanuel

> Le 10 févr. 2015 à 14:26, Christian Grün <christian.gruen at gmail.com> a écrit : > > to

On Tue, Feb 10, 2015 at 2:41 PM, Emmanuel Chateau <emchateau at laposte.net> wrote: > Hi Christian, > Here is the example of what we would achieve : > > https://gist.github.com/emchateau/5d8af7f53d6f346512c1 > > Thanks, > > Emmanuel and Philippe > > > > > Le 10 févr. 2015 à 14:26, Christian Grün <christian.gruen at gmail.com> a écrit > : > > to > >

On Wed, Feb 11, 2015 at 7:41 AM, Christian Grün <christian.gruen at gmail.com> wrote: > Emmanuel, > > Sorry for letting you wait! I guess you would like to have a function > like function-lookup("*:abc") ? > > I looked at your example, and I must confirm there is no way to look > up functions if the namespace is unknown. I see two ways out: > > 1. Use inspect:functions() to browse through all statically available > functions [1] and choose the ones you need. > > 2. If you know the namespace in advance, it's possible best to do what > you already did: Try to find the custom namespace, and resort to the > default if no function is returned. Here is an alternative way to put > it: > > let $suffix := '.models.' || map:get($queryParams, 'model') || ':' || > map:get($queryParams, 'dataType') > let $function := ( > for $prefix in (map:get($queryParams, 'project'), 'synopsx') > return fn:function-lookup($prefix || $suffix, 1) > )[1] > return xs:QName($function) > > Hope this helps, > Christian > > [1] http://docs.basex.org/wiki/Inspection_Module#inspect:functions > > > > On Tue, Feb 10, 2015 at 2:41 PM, Emmanuel Chateau <emchateau at laposte.net> wrote: >> Hi Christian, >> Here is the example of what we would achieve : >> >> https://gist.github.com/emchateau/5d8af7f53d6f346512c1 >> >> Thanks, >> >> Emmanuel and Philippe >> >> >> >> >> Le 10 févr. 2015 à 14:26, Christian Grün <christian.gruen at gmail.com> a écrit >> : >> >> to >> >>

> Le 11 févr. 2015 à 09:01, Christian Grün <christian.gruen at gmail.com> a écrit : > > An addendum: XQuery 3.1 will provide a new function > fn:load-xquery-module [1]. We haven't implemented it so far, as we > first need to sort out various questions first. It may also be that > the specification changes along with the first implementations. But it > may be something similar to what you have been requesting some time > ago.. > > [1] http://www.w3.org/TR/xpath-functions-31/#func-load-xquery-module > > > > On Wed, Feb 11, 2015 at 7:41 AM, Christian Grün > <christian.gruen at gmail.com> wrote: >> Emmanuel, >> >> Sorry for letting you wait! I guess you would like to have a function >> like function-lookup("*:abc") ? >> >> I looked at your example, and I must confirm there is no way to look >> up functions if the namespace is unknown. I see two ways out: >> >> 1. Use inspect:functions() to browse through all statically available >> functions [1] and choose the ones you need. >> >> 2. If you know the namespace in advance, it's possible best to do what >> you already did: Try to find the custom namespace, and resort to the >> default if no function is returned. Here is an alternative way to put >> it: >> >> let $suffix := '.models.' || map:get($queryParams, 'model') || ':' || >> map:get($queryParams, 'dataType') >> let $function := ( >> for $prefix in (map:get($queryParams, 'project'), 'synopsx') >> return fn:function-lookup($prefix || $suffix, 1) >> )[1] >> return xs:QName($function) >> >> Hope this helps, >> Christian >> >> [1] http://docs.basex.org/wiki/Inspection_Module#inspect:functions >> >> >> >> On Tue, Feb 10, 2015 at 2:41 PM, Emmanuel Chateau <emchateau at laposte.net> wrote: >>> Hi Christian, >>> Here is the example of what we would achieve : >>> >>> https://gist.github.com/emchateau/5d8af7f53d6f346512c1 >>> >>> Thanks, >>> >>> Emmanuel and Philippe >>> >>> >>> >>> >>> Le 10 févr. 2015 à 14:26, Christian Grün <christian.gruen at gmail.com> a écrit >>> : >>> >>> to >>> >>>