The ProWesS reader program can only render HTML files. If it is displaying a file which is not HTML then the result is not quaranteed to be anything usable.
The HTML flavor which the program is based upon is HTML3, although not a lot of it is not implemented, and older files can also be passed without problems. Basically just a few HTML3 specific constructs are interpretted (e.g. the <BQ> tag), and not even a lot of the older standards are not fully supported (no images yet etc).
The following tags can be used :
Titles, the <H7> is not strictly HTML3 but is used in some older HTML documents.
These tags are used to mark citations or an address. They just contain text which can be displayed in a different font, and with changed margins. They are all treated as identical.
Include some preformatted text (<PRE>) or a computer listing (<LISTING>) in your document. All spaces and newlines are displayed, and a monospaced font is used. Thus all the text allignment is retained.
The difference between the two is that all embedded tags are still interpretted in <PRE>, but they are just displayed in <LISTING>.
Separate the previuos and following text with a horizontal line. The line
stretches from the left till the right margin.
A closing tag is not needed.
All the text between the <COMMENT> and </COMMENT> is discarded as comments.
Specify the title for the document. This should be done exactly once in each document. The title of the document is used both for bookmarks and the history list. It is therefore recommended that the title is always meaningfull (not just "introduction", but rather "DATAdesign introduction").
A title is obligatory for all HTML documents. The preferred outline for a HTML document is: