Snow Leopard Uniform Type Identifiers

Posted: September 25, 2009 in Apple, IT/Dev
Tags: , ,

In Snow Leopard Apple replaced classic types/creators by the new UTI (Uniform Type Identifiers)technology in order to manages types and store those managed by applications. The naming scheme reminds Java’s pacakges one, and then starts with com.companyNamefor proprietary formats (or formats groups). The public prefix is used to define standard formats : public.rtf, public.xml, etc. An identifier can be associated to many old files extensions (for example public.html manages .html, .htm, .shtml, .shtm, and text/html MIME type).
Identifiers are hierarchically linked, however contrary to Java package they do not have to share the same prefix : then com.sun.java-source extends public.source-code, that extends public.plain-text, and then public.text, public.data, up to public.item.

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