
64 • XML & Related Technologies
We can say that SGML is a language of languages.
In other words, these days, we would not use SGML as the language for creating or exchanging
documents. Instead, we would use SGML to create other languages, such as HTML or XML, which are quite
good at creating or exchanging documents.
2.3 XML STRUCTURE
2.3.1 Inverted Tree Structure
It is extremely important to understand how we can create XML documents in terms of its internal structure.
That is, we must have a good grasp on the way we can organise the contents of an XML document. We
need to remember that XML organises information in a hierarchical manner. For ...