XML stands for eXtensible Markup Language (XML). It is the standard
used for World Wide Web (WWW) data exchange. It is well supported
by public domain software. The format which will be used for generating
the new XML products will be a Digital Weather Markup Language
(DWML)-based version of XML. The DWML is used to share weather
data. The specifications were written with enough flexibility however
to accommodate other environmental science applications. DWML consists
of three main parts: a header section containing a description
of the product, a temporal definition section, and the forecast
data section. For a complete description of DWML see http://www.weather.gov/mdl/XML/Design/MDL_XML_Design.htm.
On inspection, there are similarities between XML and HyperText
Markup Language (HTML). However, XML is used to describe the data,
whereas HTML is used to describe the format or to display the data.