Subject: AW: [xsl] Function to resolve URNs?|
From: "Dr. Patrik Stellmann patrik.stellmann@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 13 Jun 2017 11:48:10 -0000
Thanks, for the explanation, Michael. So I will stick to my base-uri(doc(b&)) for now. And if it should turn out to be necessary I will call a static Java method to use the URI resolver from the Saxon configuration. Regards, Patrik ------------------------------------------------------------------ Systemarchitektur & IT-Projekte Tel: +49 40 33449-1142 Fax: +49 40 33449-1400 E-Mail: Patrik.Stellmann@xxxxxxxxx<mailto:Patrik.Stellmann@xxxxxxxxx> Von: Michael Kay mike@xxxxxxxxxxxx [mailto:xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx] Gesendet: Dienstag, 13. Juni 2017 11:11 An: xsl-list@xxxxxxxxxxxxxxxxxxxxxx Betreff: Re: [xsl] Function to resolve URNs? Unfortunately terminology in this area is very confused and it's best to try and distinguish: - expanding a relative reference - this means taking what is popularly called a relative URI and turning it into an absolute URI, for example index.html becomes http://www.ibm.com/index.html. This is what the XPath resolve-uri() function does - dereferencing a URI - this means taking an absolute URI and fetching the resource identified by this URI. This may involve - redirecting a URI - this means taking a URI that doesn't directly identify a location (for example, a URN) and mapping it to a URI that does identify a location. All of these operations, confusingly, are sometimes called "resolving". If you're starting with a URN, then the first stage (resolving) is irrelevant, but the "redirecting" stage becomes essential. To redirect a URN to a dereferenceable URI, you need some kind of catalog that defines the mapping. This will usually be an "OASIS catalog". In the Java world, the mechanisms vary a bit depending which API you are using. For parsers you use an EntityResolver, for transformations you use a URIResolver, for schemas you might use an LSResourceResolver. There are various implementations of these interfaces that make use of the data in an OASIS catalog. This is all generally done outside the XSLT/XQuery code itself, in the supporting Java (etc) framework. Michael Kay Saxonica On 13 Jun 2017, at 09:02, Dr. Patrik Stellmann patrik.stellmann@xxxxxxxxx<mailto:patrik.stellmann@xxxxxxxxx> <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx<mailto:xsl-list-service@xxxxxxxxxxxx rytech.com>> wrote: Hi, I have files that reference other files and I need to get the URLs of the files being referenced (e.g. an xsd file including or importing other xsd files). I tried to use resolve-uri(@schemaLocation) which works fine for relative URLs but this does not resolve URNs (which are used in most of my use-cases). Using base-uri(doc(resolve-uri(@schemaLocation))) works fine (and Ibm processing the referenced files recursively anyway, so itbs OK for me). But still Ibm wondering if there isnbt a direct way to resolve the URNs without having to read the whole file (and also without Saxon-specific extensions like calling java methods)!? Thanks and regards, Patrik GDV Dienstleistungs-GmbH GlockengieCerwall 1 D-20095 Hamburg www.gdv-dl.de Sitz und Registergericht: Hamburg HRB 145291 USt.-IdNr : DE 205183123 GeschC$ftsfC<hrer: Dr. Jens Bartenwerfer Michael Bathke Fred di Giuseppe Chiachiarella Thomas Fischer Aufsichtsratsvorsitzender: Werner Schmidt ------------------------------------------------------------------ Diese E-Mail und alle AnhC$nge enthalten vertrauliche und/oder rechtlich geschC<tzte Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtC<mlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten Sie diese E-Mail. Das unerlaubte Kopieren sowie die unbefugte Weitergabe der E-Mail ist nicht gestattet. This e-mail and any attached files may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorised copying, disclosure or distribution of the material in this e-mail is strictly forbidden.
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