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2.2.1.3) DII File Mirrors
In case an address points to a dii file - or a subcategory of a dii file,
alternative locations for this file may be given. Here is an example:
games -> http://ugh, http://zap, http://wa/games.dii/a/b
Now when the games category is selected, an attempt is made to open the file
'http://wa/games.dii.' If this fails, the alternative addresses are tried in
the reverse order in which they were specified. In the above example, if one
of the files can be opened, the file is parsed and an attempt is made to enter
the a/b subcategory of this file.
The format of specifying mirror locations is as described because this enables
the use of macros in the following way:
@: _mirrors = http://ugh, http://zap, http://wa
games -> _mirrors/games.dii/a/b
remark:
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The above implies that mirror locations may be specified for all reference
types, such as queries and selections
(see section 2.2.2).
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