Question

My requirement is :
“Dont allow blacklisted words to appear in a specific XML tag“.

I am trying with xs:restriction using XML regex pattern.

I referenced the following link : Restrict word list in XML schema.

eg: BLACKLISTED WORDS : byte,bing,ding

The problem : If the words start with the same letter (b), byte passes for bing condition and vice versa.

Is there an AND operator I can use ? Is there any other simpler way ?

Thanks in advance !!

Answer 1

As per Michael Kay’s answer, I have implemented the logic using XSD 1.1.
(I had to change $value to @name)

Steps:
1. Used the following code with latest Xerces 1.1 implementation jar files.

<xs:element name="random-element">
    <xs:complexType>
        <xs:attribute name="name" use="required" type="xs:string" />
        <xs:attribute name="value" use="optional" type="xs:string" />
        <xs:assert test="not(tokenize(@name, '\s+') = ('byte', 'bing', 'ding'))"/>
    </xs:complexType>
</xs:element>

3. Validated using the following code :

 final SchemaFactory schemaFactory = SchemaFactory.newInstance(Constants.W3C_XML_SCHEMA11_NS_URI);
 final Schema schema = schemaFactory.newSchema(schemaFile);
 final Validator validator = schema.newValidator();
 validator.validate(xmlFile);

The constant W3C_XML_SCHEMA11_NS_URI is very important, else it will fail.