# `SF001` Write requirements
{bdg-ref-primary}`input </by_tag>`

The user shall be able to write requirements and functional tests in a textual format.

A requirement is a combination of:
  - a unique identifier
  - a statement
  - the summary of the statement in a few words (optional)

A test is constituted by:
  - one or more requirements that it validates at least partially
  - A procedure to follow, with instructions and expected behaviors / outputs


:::{dropdown} Tested by
:open: 
:icon: check-circle-fill
:color: success

[`TF001` Writing requirements as text](/tests/TF001)
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:::{dropdown} References
:icon: link
:color: secondary

__Referenced by:__
- [`SN001` Format is YAML](/requirements/SN001)
- [`SN002` Do not contraint file names](/requirements/SN002)
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__Comments__
:::{card} User
:text-align: left

This requirement is not specific enough, what information is one expected to write, and what is not needed ?
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:::{card} Angry
:text-align: left

There is no mention of test procedures
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:::{card} Antoine
:text-align: right

Both concerns are addressed in `0.0.2`

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