Yes sir...even I am confused as to what can be done in this regards. Are there any alternatives with regards to the length of a datatype. If it cannot be expressed in the DTD where else can we put that requirement?
There are lot of limitations are there while using DTD'd like
DTD is not integrated with Namespace technology so users cannot import and reuse code DTD does not support data types other than character data, a limitation for describing metadata standards and database schemas Applications need to specify document structure constraints more flexibly than the DTD allows for
To can get more information google DTD limitations.