Presentation Layer
Defines how to represent the content (as chapters, paragraphs, tables, lists,...).
Presentation Blocks
 keep-together
XSL-FO Formatting Properties to keep rendering blocks on the same page or within the same column.
 XSL-FO
Extensible Stylesheet Language (XSL) - Formating Objects (FO) to render page oriented formats.

Presentation elements that belong together. They only make sense together.

/livcos.org/LivCos/data/map/Architecture