PPX(Pretty Printer for XML) is a query language that
offers a concise description method of formatting the XML data into
HTML. In this paper, we propose a simple specification of formatting
method that is a combination description of automatic layout operators
and variables in the layout expression of the GENERATE clause
of PPX. This method can automatically format irregular XML data
included in a part of XML with layout decision rule that is referred to
DTD. In the experiment, a quick comparison shows that PPX requires
far less description compared to XSLT or XQuery programs doing
same tasks.