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Mar 26, 2025
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Update values.mdx #21164

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Update values.mdx
Kiki-Y123 Mar 26, 2025
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Update values.mdx
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pedrosousa Mar 26, 2025
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11 changes: 11 additions & 0 deletions src/content/docs/ruleset-engine/rules-language/values.mdx
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Expand Up @@ -99,6 +99,15 @@ Since the evaluation of string literal values in expressions is case-sensitive,

Cloudflare Business and Enterprise customer plans have access to the `matches` [comparison operator](/ruleset-engine/rules-language/operators/#comparison-operators) which supports regular expressions, so that you can capture multiple variants of a value with a single expression.

### Regular expression limits

Cloudflare has a few limits in place regarding regular expressions. One of those limits is that each rule supports a maximum of 64 regular expressions (regexes), regardless of your domain's plan.

You can use the following strategies to reduce the number of regular expressions in a rule:
- Use the [`contains`](/ruleset-engine/rules-language/operators/#comparison-operators) operator.
- Use the [`wildcard`](/ruleset-engine/rules-language/operators/#wildcard-matching) / [`strict wildcard`](/ruleset-engine/rules-language/operators/#wildcard-matching) operators.
- Use the [`starts_with()`](/ruleset-engine/rules-language/functions/#starts_with) and [`ends_with()`](/ruleset-engine/rules-language/functions/#ends_with) functions.

## Boolean values

Simple expressions using boolean fields do not require operator notations or values. You only need to insert the field on its own, as shown in the `ssl` example below.
Expand Down Expand Up @@ -258,3 +267,5 @@ ip.src in {198.51.100.1 198.51.100.3..198.51.100.7 192.0.2.0/24 2001:0db8::/32}

tcp.dstport in {8000..8009 8080..8089}
```