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Matrix Specification
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====================
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.. Note that this file is specifically unversioned because we don't want to
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.. have to add Yet Another version number, and the commentary on what specs we
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.. have should hopefully not get complex enough that we need to worry about
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.. versioning it.
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Matrix defines a set of open APIs for decentralised communication, suitable for
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securely publishing, persisting and subscribing to data over a global open
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federation of servers with no single point of control. Uses include Instant Messaging (IM),
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Voice over IP (VoIP) signalling, Internet of Things (IoT) communication, and bridging
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together existing communication silos - providing the basis of a new open real-time
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communication ecosystem.
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`Introduction to Matrix <intro.html>`_ provides a full introduction to Matrix and the spec.
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Matrix APIs
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-----------
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The following APIs are documented in this specification:
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{{apis}}
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`Appendices <appendices.html>`_ with supplemental information not specific to
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one of the above APIs are also available.
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Specification Versions
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----------------------
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The specification for each API is versioned in the form ``rX.Y.Z``.
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* A change to ``X`` reflects a breaking change: a client implemented against
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``r1.0.0`` may need changes to work with a server which supports (only)
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``r2.0.0``.
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* A change to ``Y`` represents a change which is backwards-compatible for
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existing clients, but not necessarily existing servers: a client implemented
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against ``r1.1.0`` will work without changes against a server which supports
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``r1.2.0``; but a client which requires ``r1.2.0`` may not work correctly
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with a server which implements only ``r1.1.0``.
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* A change to ``Z`` represents a change which is backwards-compatible on both
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sides. Typically this implies a clarification to the specification, rather
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than a change which must be implemented.
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