[MNG-5986] XML validators flag errors on poms that declare plugin configurations using the 'combine.self' attribute because the maven-4.0.0 XSD does not declare this attribute.

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Won't Fix
• Affects Version/s: 3.3.3
• Component/s: POM
• Environment: All
• Assignee: Unassigned
• Reporter: Ben Tels
• Created: 28/Feb/16 22:27
• Updated: 01/Jan/20 13:40
• Resolved: 01/Jan/20 13:40

Description

Maven recognizes an attribute 'combine.self' on the 'configuration' element within plugin declarations within a POM ('configuration' elements within and outside 'execution' elements). However, an XML validator flags use of this attribute as an error. Which is correct, because published XSD http://maven.apache.org/xsd/maven-4.0.0.xsd does not declare 'combine.self' as an attribute of 'configuration'.

Current declaration of the configuration element:

      <xs:element name="configuration" minOccurs="0">
        <xs:annotation>
          <xs:documentation source="version">4.0.0</xs:documentation>
          <xs:documentation source="description">The configuration of the reporting plugin.</xs:documentation>
        </xs:annotation>
        <xs:complexType>
          <xs:sequence>
            <xs:any minOccurs="0" maxOccurs="unbounded" processContents="skip"/>
          </xs:sequence>
        </xs:complexType>
      </xs:element>

Simple fix:

      <xs:element name="configuration" minOccurs="0">
        <xs:annotation>
          <xs:documentation source="version">0.0.0+</xs:documentation>
        </xs:annotation>
        <xs:complexType>
          <xs:sequence>
            <xs:any minOccurs="0" maxOccurs="unbounded" processContents="skip"/>
          </xs:sequence>
          <xs:attribute name="combine.self" type="xs:string" use="optional"/>
        </xs:complexType>
      </xs:element>