Needed:

• List syntax:
• Syntax 1: Page1;Page2;...;PageN (separator)
• Syntax 2: { Page1 Page2 ... PageN } (brackets)
• Syntax 3: Page1+Page2+...+PageN (standard HTML conjunction character, '+', interchangeable with ' ' in a URL) - used in MeatBall:PeriPeri's syntax
• ...
• Refernce to virtual data
• Syntax 1: @vida.Page1.@var.Variable
• Syntax 2: @vida.Page1.@caption."Chapter 2".@pages
• ...
• Search result syntax:
• Syntax 1: @search"text"
• Syntax 2: @contains=text
• Syntax 2: @searchbody.text
• ...
• Page name selection:
• Syntax 1 (regex): Pagename/* (how to specify the inclusion or exclusion of Pagename)
• Syntax 2: Pagename/*Word*/*
• ...

• @1=(Page1;Page2)/@2=@seach"Category"/@{1 AND }?(@{2 OR }?@3) (command separator needed)
• Operators 1: & | (not good, collision with HTML)
• Operators 2: + - *
• Operators 3: AND OR
• Others: SPLIT, JOIN, INTERSECT, UNION, ...

Maybe the set terminology is not accessable to typical users. Maybe a list terminology (nearer to Perl list=array) is a better compromise.

What is "the HTML command line"? Is this to do with typing in raw HTML, but adding some extra parsing? If so, you might find & is a very good character to use to indicate special operations, since it is already used roughly that way. For example: Page1∧Page2 (written &and. The "∧" character can IIRC be translated by a browser to a standard symbol, or even a picture, provided you give it ample warning. Mine does it automatically. -- ChrisPurcell