Difference
between DTD and XML schema
If you
are using a schema instead of a DTD for defining the structure and the
type of data that an XML document can have, then you are having a lot
of advantage to it.
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DTD can
have only two types of data, the CDATA and the PCDATA. But in a schema
you can use all the primitive data type that you use in the programming
language and you have the flexibility of defining your own custom data
types.
The developer
building a schema can create custom data types based on the core data
types and by using different operators and modifiers.
Object
orientation support is there in a schema and hence encapsulation and
inheritance are there in using a schema. If you use schema then support
for web services, XSLT, and other XML based technologies are there for
your XML applications.
Data types
like integer, string, floating point numbers and other data like country
codes and language codes can be used in a schema to give flexibility
to the validations.
