> For the complete documentation index, see [llms.txt](https://citemed-io.gitbook.io/citemed.io-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://citemed-io.gitbook.io/citemed.io-documentation/protocol-set-up/defining-extraction-fields-advanced-menu.md).
# Defining Extraction Fields (Advanced Menu)
These are the fields you will fill out during the [2nd Pass, Clinical Assessment](https://www.notion.so/Complete-User-Guide-CiteMed-io-624483282e594f7d8bb71611100fd7cc?pvs=4#85d1ed0a87ce4b7eb31731b9782d0b82) Part of the Review
### Default Extraction Fields
By default, [CiteMed.io](http://citemed.io/) comes with ‘data extraction’ fields to assess clinical literature that should produce Meddev 2.7.1 Rev 4 and EU MDR. These fields are as follows (subject to change in subsequent app versions).
### Adding Your Own Extraction Fields
Extraction fields can be edited (add new ones, remove old ones) from the Main Menu.
Click ‘Add Extraction Field’ to create a new field. The form looks like the following:
| Field | Description |
| ------------------- | ------------------------------------------------------------------------------------------------------------------------------------ |
| Field Name | Pick a name that’s descriptive of your extraction field. |
| Extraction Category | Select the category that the field will be applied to. Choices are Study Design, Treatment, Study Result. |
| Field Type | This is the type of object that the user will interact with. Choices are either a Text Box, or a Multi-Select Box (multiple choice). |