# Redirect to other content When you [remove](delete-a-topic.html) or [rename](topics.html#change-file-name) a topic, your readers might encounter the 404 error page when opening a previously published URL. To avoid this, Writerside suggests adding redirects from the previous [web file name](topics.html#web_file_name) to another topic. Redirection rules are stored in the `redirection-rules.xml` file and have the following syntax: ```XML Created after removal of "Introduction" from Writerside introduction.html ``` The `accepts-web-file-names-ref` attribute on a `[](instances.html#toc-element)` ensures that all applicable web file names from the corresponding redirection rule will be redirected to this entry in the [table of contents](table-of-contents.html): ```XML ``` In the previous example, all links to `introduction.html` will redirect to the web file generated from `getting-started.topic`. Procedure: Add redirect manually 1. Open the [tree file](help-modules.html#tree-file) and locate the `[](instances.html#toc-element)` that should serve as the new target. 2. Add the `accepts-web-file-names` attribute to this `[](instances.html#toc-element)` and specify the HTML file name from which to redirect. ```XML ``` If you want to redirect multiple web file names to this `[](instances.html#toc-element)` , separate them with commas, or manually create a redirection rule and reference it from the [tree file](help-modules.html#tree-file) to avoid cluttering it with a long list of web filenames. Procedure: Redirect to an external URL If the relevant content is available outside of your documentation, you can add a redirect to an external URL. For example, if you removed a topic and moved the content to a blog post, a knowledge base article, or a page in your learning center. Or maybe some feature was removed, and it is available in another product, then you can redirect to the relevant documentation page of that product. * Add the `target-for-accepts-web-file-names` attribute to a `[](instances.html#toc-element)` without an associated topic and make it [hidden](table-of-contents.html#hide-topic-in-toc) so that your readers do not see in the [TOC](table-of-contents.html). ```XML