| ``block`` | |
| ========= | |
| Blocks are used for inheritance and act as placeholders and replacements at | |
| the same time. They are documented in detail in the documentation for the | |
| :doc:`extends<../tags/extends>` tag. | |
| Block names must consist of alphanumeric characters, and underscores. The first char can't be a digit and dashes are not permitted. | |
| .. seealso:: | |
| :doc:`block<../functions/block>`, :doc:`parent<../functions/parent>`, :doc:`use<../tags/use>`, :doc:`extends<../tags/extends>` |