A more thorough explanation:

Definition: Outline form is a way of writing patent claims that uses a numbered or lettered subparagraph for each element.

For example:

1. A device comprising:
a. a first component;
b. a second component;
c. a third component.

This example shows how each element of the device is listed in a numbered subparagraph. This makes it easier to read and understand the claim.

Outline form is different from other forms of patent claim writing, such as colon-semicolon form or single-paragraph form. It is a useful tool for organizing complex claims and making them more accessible to readers.