I read that the important limitations in specific markup languages like HTML is
"A DOCUMENT MIGHT NOT BE PORTABLE TO OTHER APPLICATIONS,AS THE DATA IS NOT SELF-DESCRIBING"
Other Applications - can you please give some examples & explain?
"THE SPECIFIC MARKUP LANGUAGE HAS A PROPRIETARY WAY OF MARKING UP TEXT THAT IS NOT COMPATIBLE WITH OTHER MARKUP LANGUAGES This can create confusion and additional work for authors who must use several languages to accomodate different applications"
can somebody please explain these 2 limitations of specific markup languages which paved the way for XML?
I don't agree with either of those statements, or more exactly, I don't agree that they are limitations. I would not expect a document to be portable to another application any more than I would expect a Java program to be compilable by a Fortran compiler. And I don't expect everything to be written in one language -- I don't consider it a problem if I have to learn Java and CSS.
So perhaps you might address your questions to the person who made those statements.