Adding a custom rule in the <xsd:simpleType> element for a validation of a special case

Question

I have an XML file with the element tag product_long_description, the XML will be validated via xsd

product_long_description can have some text which I want to have max 4000 characters, product_long_description also has a few line break tags but while validating for max 4000 characters, I want to ignore all the line break for the character count

• Snippet of the XML

    <product_long_description>Lorem ipsum dolor, sit amet<br> consectetur adipisicing <br>elit. Reprehenderit, sed.</product_long_description>
  

While checking for character limit, I want to skip those line break text for the character count

• Snippet of the xsd

<xsd:element name="product_long_description" type="TextType">
    <xsd:annotation>
        <xsd:documentation>Long Description of Product</xsd:documentation>
    </xsd:annotation>
</xsd:element>



<xsd:simpleType name="TextType">
    <xsd:restriction base="xsd:string">
        <xsd:minLength value="0"/>
        <xsd:maxLength value="4000"/>
    </xsd:restriction>
</xsd:simpleType>

I tried using the below snippet and its checking for max 4000 characters, but I am still figuring out how to ignore the line break during the count check.

<xsd:simpleType name="TextType">
    <xsd:restriction base="xsd:string">
        <xsd:minLength value="0"/>
        <xsd:maxLength value="4000"/>
    </xsd:restriction>
</xsd:simpleType>

I really appreciate any help you can provide.

Answer 1

You need XSD 1.1 (or Schematron) for this kind of thing. It's then easy:

<xs:assert test="string-length(translate(., '&#xa;', '')) le 4000"/>