#### This Page

# `_id`

Each record has an `_id`. This ID is basically a form of the filename. Depending on if you are looking at an attachment or a page the rules are slightly different.

For pages the ID is the name of the folder. So if you have a page called `docs/overview/contents.lr` then `_id` is `overview`. If you have however an attachment named `docs/overview/screenshot.jpg` the `_id` will be the filename of the attachment: `screenshot.jpg`.

Note that IDs are not globally unique! There is also the `_path` which is the entire path of the record.

The `_id` is automatically set and cannot be overridden.

## Example

    <ul class="nav">
    {% for item in site.query('/projects') %}
      <li{% if item._id == this._id %} class="active"{%
        endif %}>{{ item.name }}</li>
    {% endfor %}
    </ul>

## Comments