# XML Validator in SWI-Prolog **URL:** \ **Category:** Pack\ **Created:** [March 21, 2022, 1:54pm UTC](https://swi-prolog.discourse.group/t/xml-validator-in-swi-prolog/5152 "2022-03-21T13:54:50Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![labormarket](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/labormarket/32/975_2.png) [@labormarket](https://swi-prolog.discourse.group/u/labormarket)\ **Post date:** [March 21, 2022, 1:54pm UTC](https://swi-prolog.discourse.group/t/xml-validator-in-swi-prolog/5152/1 "2022-03-21T13:54:50Z")
We received two files from government : .xsd and .xml. From the xsd we selected all necessary data. Now we want to validate xml file against the (altered) xsd. [https://www.swi-prolog.org/pack/list?p=xsd](https://www.swi-prolog.org/pack/list?p=xsd) xsd\_validate(+Schema, +Document) This validates but output is ‘true’ of ‘false’ output should be a Modified XML for the Modified Xsd , out of de original XML ?- start\_xml\_xsd(). results in: Warning: SGML2PL(xmlns): dossiers\_2022.xsd:1: #PCDATA ("") not allowed here false. So: - we have 1 XML with 1 XSD which represents its structure - we have modified the XSD file , we stripped out the unwanted fields - now we want to have a New stripped XML for the the modified Xsd Thanks! ---
**Author:** ![fnogatz](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/fnogatz/32/19_2.png) [@fnogatz](https://swi-prolog.discourse.group/u/fnogatz)\ **Post date:** [March 22, 2022, 9:50am UTC](https://swi-prolog.discourse.group/t/xml-validator-in-swi-prolog/5152/2 "2022-03-22T09:50:55Z")
Hi, author of library(xsd) here. Would you mind sending me both files [via e-mail](mailto:fnogatz@gmail.com) or in a [GitHub issue](https://github.com/fnogatz/xsd), so we could see what’s going wrong here? ---
**Author:** ![grossdan](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/grossdan/32/23_2.png) [@grossdan](https://swi-prolog.discourse.group/u/grossdan)\ **Post date:** [March 22, 2022, 10:27am UTC](https://swi-prolog.discourse.group/t/xml-validator-in-swi-prolog/5152/3 "2022-03-22T10:27:28Z")
Would’t XSLT be the tech of choice for that … ---
**Author:** ![Boris](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/boris/32/7486_2.png) [@Boris](https://swi-prolog.discourse.group/u/Boris)\ **Post date:** [March 22, 2022, 12:52pm UTC](https://swi-prolog.discourse.group/t/xml-validator-in-swi-prolog/5152/4 "2022-03-22T12:52:33Z")
XSLT is sadly just a language/spec. You need an implementation in order to use it, and at that point you have to start making decisions what to use and what it means for your use case. ---
**Author:** ![grossdan](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/grossdan/32/23_2.png) [@grossdan](https://swi-prolog.discourse.group/u/grossdan)\ **Post date:** [March 22, 2022, 12:55pm UTC](https://swi-prolog.discourse.group/t/xml-validator-in-swi-prolog/5152/5 "2022-03-22T12:55:59Z")
As far as i recall, I used an XSLT processor, with a built-in debugger – to translate between one XML based representation to another one ---
**Author:** ![labormarket](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/labormarket/32/975_2.png) [@labormarket](https://swi-prolog.discourse.group/u/labormarket)\ **Post date:** [March 22, 2022, 3:02pm UTC](https://swi-prolog.discourse.group/t/xml-validator-in-swi-prolog/5152/6 "2022-03-22T15:02:46Z")
> [@Boris](#): > > XSLT > **[Free Online XSL Transformer (XSLT) - FreeFormatter.com](https://www.freeformatter.com/xsl-transformer.html)** > > This free online XSL Transformer (XSLT) lets you transform an XML file using an XSL file and formats the output with your chosen indentation