Manual Content and User Note Separation
    The manual content and the user notes are separated to
    php_manual_LANG.chm and
    php_manual_notes.chm. There were several resons
    to do this, including:
    
- 
       This way you can update the user notes and the manual independently
       as you need.
       
- 
       You can have more than one language of the manual, while only
       need to have one notes file. All the CHM files need to be in the
       same directory, and all translations need to share the same
       preferences if you would not like to have more then one notes file.
       
- 
       You can bookmark manual pages with notes, or just a notes part
       of a page separately.
       
- 
       You can "turn off" user note display and user note search results by
       simply deleting php_manual_notes.chm, moving it
       out of the directory or renaming it.
       
    All these benefits lead us to provide the manual the way you can see it
    right now. This distribution had the effect on the full text search that
    you get search results from the manual content and from the user notes
    as separate ones. The "Location" column shows the source of the result,
    also enabling you to "add precedence" to manual content results with
    ordering the results by "Location". User note page titles are also
    prefixed with "N:" to make them easily distinguishable in the favorites
    list (there's no location info in the favorites list).