Filtrix HTML Page

Filtrix writes two-color rasters as uncompressed GIF and uses JPEG for all other raster depths. Future releases will be able to read/write PNG raster formats as well.

The Filtrix user has the choice of creating HTML documents with CSS (external cascading style sheets) and inline styles, or with traditional HTML 3.2 standards-based tags.

If the conversion is to HTML-with-CSS, Filtrix will convert the source "filename.ext" to Filename.htm, Filename.css, and for each graphic created there will be a corresponding Filename###.gif or Filename###.jpg file created, where ### is a sequential number.

If the export is from FrameMaker, choosing the HTML-with-CSS export option permits the conversion of paragraph format tags, storing the format definitions in an external CSS document, which facilitates modifying them. Local format overrides, found in many FrameMaker documents, are also preserved via HTML inline styles.

Paragraph formats/styles will be preserved best when using the export to HTML-with-CSS and viewing the output HTML files with a CSS-capable browser. Style names are filtered so that they contain only alphanumeric characters, since other characters can cause problems with some browsers.

Since HTML does not support tabs or tab leaders, these attributes will be lost as Filtrix converts into HTML.

Columns are supported, though not all browsers recognize column tags.

Tables are converted preserving straddles, rules, captions, and header and body row identification as completely as is permitted by the target application.

In rendering paragraph indents into HTML, the CSS filter uses "text-indent" for first line indents, "margin-left" for either hanging or block-left indents, and "right-margin" for block right indents. The standard HTML (non-CSS) filter uses the <UL> construct for block left indents and "text-indent" as first line indents. The standard HTML filter cannot preserve the right indent attribute.

Left and right paragraph margins are referenced to a default value of one inch left and right margins. Margins less than this value are ignored.

Special characters are converted according to the available HTML character set, which is a subset of the 256 ISO character set. Since this is generally more limited than most word processor character sets, Filtrix may have trouble mapping some characters. If Filtrix is unable to successfully map a given character, it either uses the currently defined font-face character or, as a last resort, inserts a "?" to indicate that the character can't be rendered by HTML standards.

Single level autonumbers are supported into HTML, where the <OL> tag is used. Multi-level autonumbers are written out as literal text.

Indexing is not presently supported; a later release will provide an index containing links to each indexed item.

Footnotes: Although there is no explicit HTML footnote feature, Filtrix creates links for each instance encountered in the source document and each footnote or endnote is treated as an endnote. A listing of the footnote contents is concatenated to the end of the document.

Cross-references are treated as hyperlinks.

Paragraph and Character graphic anchor types are created.

Table borders are either on or off, and Filtrix makes this determination based on whether or not any of the outer table borders are specified as visible. Fill color is supported in table cells: image-fills are not supported. Horizontal and vertical straddles, graphics, and text attributes are supported.

Any hidden text converted from a source document will be written to HTML using the comment tag.

Notes on converting HTML to other formats