# Use read only attributes in XPath constraints

<table><thead><tr><th width="138">Check ID</th><th>DOM_0002</th></tr></thead><tbody><tr><td>Category</td><td>Security</td></tr><tr><td>Summary</td><td>XPath constraints are used in security access rules to limit the data that a user can view or manage. It is important however that a user does not have read/write access to any of the attributes or associations used in the XPath constraint because otherwise they can change these values and circumvent the XPath constraint. </td></tr><tr><td>Options</td><td>This check does not have any options.</td></tr><tr><td>Pass</td><td>User roles don't have read/write access to any attributes or associations used in XPath constraints for that role.</td></tr><tr><td>Fail</td><td>User roles have read/write access to an attribute or association used in one or more XPath constraints for that role.</td></tr></tbody></table>


---

# 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.bluestorm.io/checks/domain_model/dom_0002.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.