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Movable Type allows you to enter a list of categories, then assign one or more categories to each of your entries. This allows you to keep track of your entries from a maintenance standpoint--for example, when listing your entries you can choose to list entries only from a particular category--and it can also be used to provide a categorization structure to your archives.
Each entry can be assigned one primary category and any number of secondary
categories. The primary category is used when you wish to display information
about only one of the categories to which an entry is assigned--for example,
when using the
<$MTEntryCategory$> tag. When you wish to display
a list of all of the categories to which a post has been assigned, you can use
The difference between primary and secondary categories is not one of ranking
but rather of usage--your secondary categories are not necessarily ``lesser''
or ``lacking in importance'' when compared to your primary category. Rather, the
difference is one of usage: the primary category is the category which will
be displayed when using the
<$MTEntryCategory$> tag, or when
linking to the
Category archive for an entry using
You can manage your list of categories in Movable Type by logging in,
selecting a blog, then clicking Edit Categories. Add new categories by
typing their labels into the empty text entry boxes; the system always shows
five empty boxes, so if you fill up the first five, just press
you'll get five more.
You can set up category archiving in your blog configuration--select a blog, then click Edit Blog Configuration. In the Archive Configuration section, under Archive Frequency check the box next to By Category.