Content Types
A
Arbortext Advanced Print Publisher document contains a copy of the XML instance being formatted plus a number of other content objects held in tags. Refer to
Stylesheets, Templates, and Documents for information. Each content object is held in an
Arbortext Advanced Print Publisher tag.
Arbortext Advanced Print Publisher has a number of different tag types to support the different content types that its documents can contain.
Document content falls into three groups:
• Non-XML text content — plain text that may or may not contain markup
Markup is essential in Arbortext Advanced Print Publisher to support the association of formatting properties with text. It is possible to style text content that is not of XML format, well formed, or structured.
Plain text in an Arbortext Advanced Print Publisher document is of tag type .tx, known as a text stream.
• XML content
Two tag types hold XML content:
◦ .xm (XML stream) — has an associated read-only DOM against which XPath expressions can be performed and XSLT run.
◦ .xd (XML DOM stream) —a read-write XML DOM content type. XML DOM streams behave similarly to XML streams. As an added benefit they can manipulate the DOM tree using W3C DOM Level 2 Core functionality.
• Graphical content
Two tag types hold graphical content:
◦ .og (object graphic) — equivalent to vector graphics
◦ .rg (raster graphic) — equivalent to bitmap graphics
All Arbortext Advanced Print Publisher content types can either be linked to the current Arbortext Advanced Print Publisher document or loaded into it. Typically, graphical content is linked and text content is loaded, as changes to text content are likely but changes to graphics are not.