Architecture:MediaWiki/Pattern language

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Classes in the MediaWiki code base use the pattern language outlined below. As per version 1.35, the pattern language is aspirational. That is, the patterns described here do not describe current reality, but are intended as a guide for creating new code and for improving existing code.

Patterns, in no specific order:

Some patterns may be confined to technical layers, but others may be applicable on all layers. Some layers may have restrictions on what other patterns they can make use of.