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- .. _nonstandard:
- =================
- Nonstandard UUIDs
- =================
- .. toctree::
- :titlesonly:
- :hidden:
- nonstandard/version6
- nonstandard/guid
- nonstandard/other
- Outside of `RFC 4122`_, other types of UUIDs are in-use, following rules of
- their own. Some of these are on their way to becoming accepted standards, while
- others have historical reasons for remaining valid today. Still, others are
- completely random and do not follow any rules.
- For these cases, ramsey/uuid provides a special functionality to handle these
- alternate, nonstandard forms.
- Version 6: Reordered Time
- This is a new version of UUID that combines the features of a
- :ref:`version 1 UUID <rfc4122.version1>` with a *monotonically increasing*
- UUID. For more details, see :ref:`nonstandard.version6`.
- Globally Unique Identifiers (GUIDs)
- A globally unique identifier, or GUID, is often used as a synonym for UUID.
- A key difference is the order of the bytes. Any `RFC 4122`_ version UUID may
- be represented as a GUID. For more details, see :ref:`nonstandard.guid`.
- Other Nonstandard UUIDs
- Sometimes, UUID string or byte representations don't follow `RFC 4122`_.
- Rather than reject these identifiers, ramsey/uuid returns them with the
- special Nonstandard\\Uuid instance type. For more details, see
- :ref:`nonstandard.other`.
- .. _RFC 4122: https://tools.ietf.org/html/rfc4122
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