Merge pull request #21 from lsst-ts/tickets/DM-43089_2

Tickets/dm43089_2: Added references to the XML Unit Standards document

System-Architecture/CSC-Overview/index.rst

@@ -181,6 +181,10 @@ These event topics are received by the listener, which can then be handled for f
 Telemetry is the on-going data stream generated by the CSC.
 It is published at a set rate.
 
+The full process for defining CSCs and all the topics is described in the `ts_xml README <https://github.com/lsst-ts/ts_xml/blob/main/README.md>`_.
+However, of particular interest is the policy regarding defining units in the XML definition files.
+For that, please refer to the :ref:`XML_Units` document.
+
 Sources
 =======
 * `CSC Development <https://confluence.lsstcorp.org/pages/viewpage.action?spaceKey=LTS&title=CSC+Development>`_

index.rst

@@ -109,6 +109,24 @@ Due to the large size and complexity of assembling a single LSST image, a visual
 
 .. _Obs-Ops-Operational-Tutorials:
 
+System Development Guidelines and Policies
+==================================================================
+
+The CSC interface definitions are data objects and they are stored in the `ts_xml <https://github.com/lsst-ts/ts_xml>`_ repository.
+This is where CSCs and their APIs are defined.
+The Service Abstraction Layer (SAL) is an utility that consumes the XML to produce language specific libraries that enable communication over the DDS network.
+The procedures for maintaining these definitions are defined in the `ts_xml <https://github.com/lsst-ts/ts_xml>`_ repository itself.
+As each CSC is developed under the guidelines of the specific team doing the work, there is no single resource to look at to define CSC development.
+However, there are certain system level policies that govern the development processes.
+
+System-Level Policies
+---------------------
+:ref:`XML_Units`
+
+Team Specific Development Guidelines
+------------------------------------
+`TSSW Developers Guide <https://tssw-developer.lsst.io>`_.
+
 System Testing, Deployments, and Upgrades
 ==================================================================