Element declarations in XSchemas are made using the XSC:ElementDecl element and its contents:
id ID #REQUIRED
<!ELEMENT XSC:ElementDecl (XSC:Doc?, (XSC:Ref | XSC:Choice | XSC:Seq | XSC:Empty | XSC:Any | XSC:PCData | XSC:Mixed), XSC:AttDef*)>
<!-- id is the element name -->
<!ATTLIST XSC:ElementDecl XSC:
The XSC:id attribute identifies the name of the element, and is required. An element declaration would look like:
This declaration would declare an element named "Species", which would appear in an instance as:
The XSC:id attribute must be unique, as it provides the name of the element as declared here, and is also used by other elements to refer to this element in their content model declarations. Note that an element must declare a content model, even if that content model is empty. Documentation (in the XSC:Doc element) and attribute declarations (using XSC:AttDef elements) are optional.
Documentation about the element, content-model information, and attribute information are stored as sub-elements of the XSC:ElementDecl element. Documentation is covered in 2.6.1, Documentation Extensions. Content Model is covered in 2.3, Content Model Declarations, and attributes are covered in 2.4, Attribute Declarations.