logic flowchart

NB. The term "gen true" is defined and discussed in FAQ 3.5.

This is how ICRAfilter reads and interprets labels. MSIE Content Advisor follows a similar pattern with two very significant differences:

  1. Whatever page is accessed, Content Advisor also checks the default file in the root directory for labels
  2. Labels are not cached

Some key factors come out of this:

  • If you own your own domain name, and the site on that domain is held within a frameset, a single label in the index file - the one that defines the frameset - is sufficient. Both ICRAfilter and MSIE Content Advisor will both be satisfied.
  • If you own a domain and all your visitors come to your site through the default (index) file in the root directory, then again, a single copy of the meta tag in that index file will effectively label your entire site. ICRAfilter will read and cache the label when visitors first come to your site and apply it; MSIE Content Advisor will also find the label and apply it.
  • Wherever else you may or may not put a label, ALWAYS include it in the default (index) file in the root directory.
  • If a visitor using ICRAfilter first enters your site on a page which is not labelled, it will be treated as having "unknown content" and may therefore be blocked by default.
  • If you have some key pages which are typical entry points for your site, these should all carry a copy of the label. Remember, ICRAfilter will cache any "gen true" labels it finds so that pages visited subsequently will be treated as labelled, even if they are not carrying their own label. (see FAQ 3.5 for a definition of "gen true.")
  • If you are labelling one part of your site differently from the rest, then make sure that visitors will have come via pages carrying the relevant branch label.
  • The safest, simplest option is to label every page.
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