validate for online resource protocol

[wangf1122]

The issue is this field is mandatory and can still be saved as empty from the user input.

As result, the protocol will be filled with some default value "WWW:DOWNLOAD-1.0-http--download" which is not correct. There is correct value which is HTTP as quick compare.

The validation rule will catch this default incorrect value and output error message as:

[wangf1122]

@josegar74 @ianwallen

This seems to be a pending PR which we skipped.

[ianwallen]

@wangf1122 I can see in the compiled .xslt (from .sch file) that there is a line similar to the following to get the schematron locale data.

  <xsl:variable xmlns:svrl="http://purl.oclc.org/dsdl/svrl" name="loc"
                 select="document(concat('../loc/', $lang, '/', $rule, '.xml'))"/>

So I would expect that you should be able to do the following to get the labels.xml locales file

<xsl:variable name="locLabel" select="document(concat('../loc/', $lang, '/labels.xml'))"/>

In schematron rules, you cannot use <xsl:variable but you can use <sch:let and you can also use <xsl:function. So you can try with <sch:let. If you can't get <sch:let to work then you can try to create a <xsl:function to be used in the <sch:let. Look at the other schematrons for sample using <xsl:function