[rules-users] XSD resource type

Hello, I am trying Spring - Drools integration and in the documentation I found this line: <drools:resource source="classpath:org/drools/container/spring/model.xsd" /> (section 2.1.1.4. Define a KnowledgeBase, example 2.2) I also realized that XSD resource type is present in the resourceTypeEnum (drools-spring.xsd). Could I ask you where to find more information about this resource type? Best regards, Radovan Synek