Michael Kay wrote:
Unfortunately schema-aware processing in XQuery and XSLT
doesn't give you this capability.
Is there a workaround?
Is there is no way for an XSLT program to express: "Hey, validate xyz against
the XML Schema and if xyz is not schema-valid then discard it." No way to
express that?
Here is an idea: feed into the XSLT program a BookStore XML document that is
known to be schema-valid and then in the XSLT program ignore it and instead
process BookStore-v2.xml, which is input via the document() function. Below is
my attempt at this. I no longer get an error, but it doesn't give the correct
results; it just gives an empty root element (<BookISBNs/> ) Any suggestions?
---------------------------------------------------------------
Roger's Brilliant Workaround BookStore.xsl
(doesn't work as desired)
---------------------------------------------------------------
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:bk="http://www.books.org";
exclude-result-prefixes="bk"
version="2.0">
<xsl:output method="xml"/>
<xsl:variable name="new-BookStore" select="document('BookStore-v2.xml')" />
<xsl:import-schema namespace="http://www.books.org";
schema-location="BookStore.xsd"/>
<xsl:template match="/">
<BookISBNs>
<xsl:for-each
select="$new-BookStore/bk:BookStore/bk:Book/bk:ISBN/text()">
<xsl:if test=". instance of bk:ISBN-type">
<ISBN><xsl:value-of select="."/></ISBN>
</xsl:if>
</xsl:for-each>
</BookISBNs>
</xsl:template>
</xsl:transform>
-----Original Message-----
From: Michael Kay [mailto:mike(_at_)saxonica(_dot_)com]
Sent: Tuesday, July 16, 2013 5:49 AM
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: Re: [xsl] How to check an element's type against an XSD simpleType and
skip that element if it does not conform to the simpleType?
Unfortunately schema-aware processing in XQuery and XSLT doesn't give you this
capability. XSLT doesn't have the capability to process a PSVI that contains a
mix of valid and marked-as-invalid elements. It would be nice if it did, and
perhaps that's something for me to explore as a Saxon extension.
Michael Kay
Saxonica
On 15 Jul 2013, at 19:55, Costello, Roger L. wrote:
Hi Folks,
I would like to do schema-aware processing on this document:
<BookStore xmlns="http://www.books.org";>
<Book>
<Title>My Life and Times</Title>
<Author>Paul McCartney</Author>
<Date>1998</Date>
<ISBN>xxx1-56592-235-2</ISBN>
<Publisher>McMillan Publishing</Publisher>
</Book>
...
</BookStore>
I have a corresponding XML Schema, which I show in its entirety at the bottom
of this message. The item of interest, however, is its simpleType for ISBN
elements:
<xsd:simpleType name="ISBN-type">
<xsd:restriction base="xsd:string">
<xsd:pattern
value="\d{1}-\d{5}-\d{3}-\d{1}|\d{1}-\d{3}-\d{5}-\d{1}|\d{1}-\d{2}-\d{6}-\d{1}"/>
</xsd:restriction>
</xsd:simpleType>
I want my XSLT program to output each ISBN in the XML document. If an ISBN
does not conform to the simpleType, then I want to skip that ISBN element and
continue processing. At the bottom of this message is the XSLT in its
entirety. The item of interest, however, is this snippet:
<xsl:for-each select="/bk:BookStore/bk:Book">
<xsl:if test="data(bk:ISBN) instance of bk:ISBN-type">
<ISBN><xsl:value-of select="bk:ISBN"/></ISBN>
</xsl:if>
</xsl:for-each>
The for-loop iterates through each Book and checks to see if the value of its
ISBN element conforms to ISBN-type; if it doesn't conform, then it skips that
ISBN and goes to the next Book.
In the XML document shown above, the Book element has an ISBN
(xxx1-56592-235-2) that is not valid, so I expect my XSLT program to skip it.
However, that is not happening. I get this error message:
The content "xxx1-56592-235-2" of element <ISBN> does not
match the required simple type. Value "xxx1-56592-235-2"
contravenes the pattern facet "\d{1}-\d{5}-\d{3}-\d{1}|\d{1}-..."
of the type ISBN-type
What am I doing wrong please?
/Roger
-----------------------------------------------------------
BookStore.xsl
-----------------------------------------------------------
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:bk="http://www.books.org";
exclude-result-prefixes="bk"
version="2.0">
<xsl:output method="xml"/>
<xsl:import-schema namespace="http://www.books.org";
schema-location="BookStore.xsd"/>
<xsl:template match="/">
<BookISBNs>
<xsl:for-each select="/bk:BookStore/bk:Book">
<xsl:if test="data(bk:ISBN) instance of bk:ISBN-type">
<ISBN><xsl:value-of select="bk:ISBN"/></ISBN>
</xsl:if>
</xsl:for-each>
</BookISBNs>
</xsl:template>
</xsl:transform>
-----------------------------------------------------------
BookStore.xsd
-----------------------------------------------------------
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema";
targetNamespace="http://www.books.org";
xmlns="http://www.books.org";
elementFormDefault="qualified">
<xsd:element name="BookStore">
<xsd:complexType>
<xsd:sequence>
<xsd:element ref="Book" minOccurs="0" maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
<xsd:element name="Book">
<xsd:complexType>
<xsd:sequence>
<xsd:element ref="Title"/>
<xsd:element ref="Author"/>
<xsd:element ref="Date"/>
<xsd:element ref="ISBN"/>
<xsd:element ref="Publisher"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
<xsd:element name="Title" type="xsd:string"/>
<xsd:element name="Author" type="xsd:string"/>
<xsd:element name="Date" type="xsd:string"/>
<xsd:element name="ISBN" type="ISBN-type"/>
<xsd:element name="Publisher" type="xsd:string"/>
<xsd:simpleType name="ISBN-type">
<xsd:restriction base="xsd:string">
<xsd:pattern
value="\d{1}-\d{5}-\d{3}-\d{1}|\d{1}-\d{3}-\d{5}-\d{1}|\d{1}-\d{2}-\d{6}-\d{1}"/>
</xsd:restriction>
</xsd:simpleType>
</xsd:schema>
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