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message type and data types

hi all,

the following is a statement in

"For technical reasons, a data type is not sufficient to describe the instance of a message. In XML schema, data types are defined as abstract types that are not yet fixed to an element"

as per the above where can i see the data types being defined as abstract types ? can i see them in the xsd ?or did i misunderstand the statement ...

"that(data types) are not yet fixed to an element"

what does it mean? why message types alone can be assigned to elements , why not data types?

if message types alone has some functionality why cant data types have them ?

please elaborate .

Former Member
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