  HTML (Hyper Text Markup Language) has been the primary tool for designing and
developing web pages over the years. Content and formatting information are
placed together in an HTML document. XML (Extensible Markup Language) is a
markup language for documents containing semi-structured and structured
information. XML separates formatting from the content. While websites designed
in HTML require the formatting information to be included along with the new
content when an update occurs, XML does not require adding format information
as this information is separately included in XML stylesheets (XSL) and need
not be updated when new content is added. On the other hand, XML makes use of
extra tags in the XML and XSL files which increase the space usage. In this
study, we design and implement two experimental websites using HTML and XML
respectively. We incrementally update both websites with the same data and
record the change in the size of code for both HTML and XML editions to
evaluate the space efficiency of these websites.
