•ServiceData is a lot like xsd:element
•ServiceData is a restriction of xsd:element
–annotation;
–name; type; minOccurs; maxOccurs; nillable; and
anyAttribute
•ServiceData is an extension of xsd:element
–open content
–modifiable
•can this SDE be changed by requestor
–mutability
•how can requestor reason about how the SDE values
change
•static, constant, extendable, mutable
–