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= UUID Reference
:page-parent: Development
:page-nav_order: 6
// SPDX-FileCopyrightText: 2022 Alyssa Ross <hi@alyssa.is>
// SPDX-License-Identifier: GFDL-1.3-no-invariants-or-later OR CC-BY-SA-4.0
https://en.wikipedia.org/wiki/Universally_unique_identifier[UUIDs] are
used extensively throughout Spectrum. When encountering a UUID in the
codebase, it can be difficult to understand what exactly the UUID
means, and where it originates from -- is it from some standard, or
Spectrum-specific?
To solve this problem, this reference documents all of the UUIDs used
in Spectrum.
== https://en.wikipedia.org/wiki/GUID_Partition_Table[GPT] Partition Types
=== `c12a7328-f81f-11d2-ba4b-00a0c93ec93b`
"EFI System Partition", from the https://uefi.org/specifications[UEFI
Specification].
=== `4f68bce3-e8cd-4db1-96e7-fbcaf984b709`
"Root Partition (amd64/x86_64)" from the
https://uapi-group.org/specifications/specs/discoverable_partitions_specification/[Discoverable Partitions
Specification].
=== `2c7357ed-ebd2-46d9-aec1-23d437ec2bf5`
"Root Verity Partition (amd64/x86_64)" from the
https://uapi-group.org/specifications/specs/discoverable_partitions_specification/[Discoverable Partitions
Specification].
=== `9293e1ff-cee4-4658-88be-898ec863944f`
xref:user-partition.adoc[Spectrum user partition].
=== `56a3bbc3-aefa-43d9-a64d-7b3fd59bbc4e`
https://github.com/endlessm/eos-installer["eosimages"] partition on the
Spectrum combined live system / installer image.
== Combined Image Partition IDs
These UUIDs are used as the unique partition identifiers for the
Spectrum combined live system / installer image.
=== `6e23b026-9f1e-479d-8a58-a0cda382e1ce`
The Spectrum installer system.
'''
== Finding Undocumented UUIDs
Running the `Documentation/scripts/undocumented-uuids.sh` script from
the root of the Spectrum repository will scan the entire tree for
UUIDs not mentioned in this document.
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