Xml – Intellij IDEA : How to validate XML SCHEMA 1

intellij-ideaxmlxml-validationxsd

I am trying out XML SCHEMA 1.1 in IDEA 13.02 with JDK 7

This is an XML schema code I got from a tutorial. When I open this file in IntelliJ IDEA and click "Validate" , I get the following errors:

cvc-complex-type.2.4.a: Invalid content was found starting with
element 'openContent'. One of
'{"http://www.w3.org/2001/XMLSchema":annotation,
"http://www.w3.org/2001/XMLSchema":simpleContent,
"http://www.w3.org/2001/XMLSchema":complexContent,
"http://www.w3.org/2001/XMLSchema":group,
"http://www.w3.org/2001/XMLSchema":all,
"http://www.w3.org/2001/XMLSchema":choice,
"http://www.w3.org/2001/XMLSchema":sequence,
"http://www.w3.org/2001/XMLSchema":attribute,
"http://www.w3.org/2001/XMLSchema":attributeGroup,
"http://www.w3.org/2001/XMLSchema":anyAttribute}' is expected.

This is the XSD File using XML Schema 1.1 enhancements:

<?xml version="1.0"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
        targetNamespace="http://www.books.org"
        xmlns:pub="http://www.books.org"
        elementFormDefault="qualified">

    <complexType name="Publication" abstract="true">
        <openContent mode="interleave">
            <any />
        </openContent>
        <sequence>
            <element name="Title" type="string" />
            <element name="Author" type="string" />
            <element name="Date" type="gYear"/>
        </sequence>
    </complexType>

    <complexType name="BookPublication">
        <complexContent>
            <extension base="pub:Publication">
                <openContent mode="none">
                </openContent>
                <sequence>
                    <element name="ISBN" type="string"/>
                    <element name="Publisher" type="string"/>
                </sequence>
            </extension>
        </complexContent>
    </complexType>

    <element name="BookStore">
        <complexType>
            <sequence>
                <element name="Book" type="pub:BookPublication" maxOccurs="unbounded" />
            </sequence>
        </complexType>
    </element>

</schema>

Is there a way to validate this or upgrade the validator used by IDEA ?

Best Solution

Try adding xmlns:vc="http://www.w3.org/2007/XMLSchema-versioning" and vc:minVersion="1.1" to <schema>:

<schema xmlns="http://www.w3.org/2001/XMLSchema"
        targetNamespace="http://www.books.org"
        xmlns:pub="http://www.books.org"
        elementFormDefault="qualified"
        xmlns:vc="http://www.w3.org/2007/XMLSchema-versioning" 
        vc:minVersion="1.1"
>  ... </schema>

It will inform IDEA that you are using a XSD 1.1 Schema.

I've used XSD 1.1 with WebStorm 8, which I believe uses the same parser as IDEA.

IntelliJ 14.X Onwards

From version 14.0 onwards, the path to the setting dialog is slightly different, a General submenu has been added between Editor and Appearance as shown below

enter image description here

IntelliJ 8.1.2 - 13.X

From IntelliJ 8.1.2 onwards, this option is in File | Settings¹. Within the IDE Settings section of that dialog, you'll find it under Editor | Appearance.

On a Mac, these are named IntelliJ IDEA | Preferences...

enter image description here

R – XML Schema – Key in sequence

The key element is not supposed to go inside the sequence element. Instead, you put it as a child of the xs:element that defines ReferralCollection. The selector and field are child elements of the key element that define what is supposed to be unique. Both are XPath expressions. The selector value sets up the XPath context, and the field elements (there can be more than one) define the combination of values that are supposed to be unique. So in your case, the key element might look something like this:

<xs:key name="URL">
  <xs:selector xpath="."/>
  <xs:field xpath="rd:keyword"/>
</xs:key>

The selector here selects the element itself, that is, ReferralCollection. Then, in that context, the field element denotes the values of the keyword elements, which are thus constrained to be unique. The value of an element in XPath is its text content.

I haven't done much with key elements (or XML Schema in general), so some details above might not be correct, but the basic idea is what I explained, so it should be easy to fix any mistakes I made. Oh, also note that I used the rd prefix for your READOO namespace; in my experience using explicit prefixes is always best when dealing with XPath, so you need the appropriate xmlns:rd attribute in your schema to make this work.

EDIT: So it seems you want something like this:

<xs:element name="ReferralCollection">
  <xs:complexType>
    <xs:sequence>
      <xs:element name="URL" maxOccurs="unbounded">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="stem" type="xsd:string"/>
            <xs:element name="keyword" maxOccurs="unbounded">
            ...
            </xs:element>
          ...
  </xs:complexType>

  <xs:key name="URL">
    <xs:selector xpath="./URL"/>
    <xs:field xpath="stem"/>
  </xs:key>
</xs:element>

Is this closer to what you meant? It has URL elements, one or more, each containing a stem element followed by one or more keyword elements. The key constraint should make the contents of the stem elements unique.

Best Solution

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