Note: Please do not add articles directly to this category if you can place them in one or more of the subcategories. The articles remaining in this category either have no clear parent category or are waiting for someone to sort them into the correct subcategory.
The Extensions by implementation type/ur category contains subcategories that collect together articles for each of the extension types used in the Template:Extensionimplementation type field.
This category has the following 2 subcategories, out of 2 total. The number of included categories (C), pages (P) and files (F) is stated in brackets.