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.. _glossary:
Glossary
========
.. glossary::
component
A part of a URL delimited by slashes. The URL "/help/about" contains
two components: "help" and "about".
generation
The act of creating a URL based on a route name and/or variable values.
This is the opposite of matching. Finding a route by name is called
*named generation*. Finding a route without specifying a name is
called *nameless generation*.
mapper
A container for routes. There is normally one mapper per application,
although nested subapplications might have their own mappers. A
mapper knows how to match routes and generate them.
matching
The act of matching a given URL against a list of routes, and
returning the routing variables. See the *route* entry for an example.
minimization
A deprecated feature which allowed short URLs to match long paths.
Details are in the ``Backward Compatibility`` section in the manual.
route
A rule mapping a URL pattern to a dict of routing variables. For
instance, if the pattern is "/{controller}/{action}" and the requested
URL is "/help/about", the resulting dict would be::
{"controller": "help", "action": "about"}
Routes does not know what these variables mean; it simply returns them
to the application. Pylons would look for a ``controllers/help.py``
module containing a ``HelpController`` class, and call its ``about``
method. Other frameworks may do something different.
A route may have a name, used to identify the route.
route path
The URL pattern in a route.
routing variables
A dict of key-value pairs returned by matching. Variables defined in
the route path are called *path variables*; their values will be taken
from the URL. Variables defined outside the route path are called
*default variables*; their values are not affected by the URL.
The WSGI.org environment key for routing variables is
"wsgiorg.routing_args". This manual does not use that term because it
can be confused with function arguments.
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