# CommentDelimiters

Learn how to define custom comment delimiters.

`CommentDelimiters` allow you to override standard HTML comment delimiters (`<!-- foo -->`).

Custom comment delimiters are useful when using non-standard markup which do not allow HTML-style comments, such as MDX.

```ini
[formats]
mdx = md

[*.mdx]
BasedOnStyles = Vale

CommentDelimiters = {/*, */}
```

When `CommentDelimiters` are set, you can take full advantage of markup-based configuration to enable or disable specific rules within a section.

For instance, when using MDX:

```mdx
{/* vale off */}

This is some text ACT test

This is some text ACT test

{/* vale on */}

{/* vale vale.Redundancy = NO */}

This is some text ACT test

{/* vale vale.Redundancy = YES */}
```

Related keys: [TokenIgnores](/keys/tokenignores.md) [Transform](/keys/transform.md)


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.vale.sh/keys/commentdelimiters.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.