## Conventions Cabloy-CMS has the following conventions: - Each language has its own category tree - Each category must belong to a certain `language` - Each article must belong to a certain `category` - Each category does not contain `child categories` and `articles` at the same time > `Tags` can be used to achieve the feature which articles could belong to multiple categories in some other CMS framework/platform ## Configure Category Tree Enter the page `Settings/CMS`, click `Categories` of the language, then click the button `Add` to add several categories, as follows: ![5](https://portal.cabloy.com/api/a/file/file/download/e69b79fe74674f8b9794ff24248e5169.png) ## Language Building If the `category tree` is changed, must click `language/build` to build the whole site of this language