4.2.02 BTITLE tag
@start BTITLE @stop
This tag is replaced by the value of the BTITLE field in the database. BTITLE is supposed to be used for the browser title (i.e. the TITLE tag in the HTML head of the page). For pages generated off records in Data Tables the BTITLE is the title field.
The example below shows a part of a model file with te BTITLE tag.
<meta http-equiv="content-type" content="text/html; charset=utf-8" / >
<title> BTITLE </title<
The model used for the page you are looking at has exactly that. BTITLE is here replaced by the term "Tags - Builtin - BTITLE"