Programmer's Guide > Programming and Scripting Techniques > Line Numbering in Arbortext Editor and Arbortext Publishing Engine > Line numbering application building reference > The Layout file and document type > Layout structure
  
Layout structure
A .layout file describes the page structures that result from the composition process applied to a source document. A typical .layout file will describe one or more Page structures.
The Layout element's date attribute holds the creation date in the form DD-MM-YYYY. The file attribute holds the system path of the source document, if available.
<!ELEMENT Layout (Page*)>
<!ATTLIST Layout
date CDATA #IMPLIED
file CDATA #IMPLIED >