Accessors

Deconstruct values in Query Data Model

Example : Attributes

name : AttrNode -> Ref(QNameValue)
value : AttrNode -> Ref(ValueNode)
type : AttrNode -> Ref(ElemNode)

<xsd:attribue name=“price” type=xsd:decimal/>
<part price=10.50/>

name(A1) = ref(qnameValue(null, “price”))
value(A1) = ref(decimalValue(10.50, Ref(Def_decimal)))
type(A1) =
   <!-- data model representation of simple type decimal -->