Terminology Syndication Feed Implementation Guide
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: Ontoserver RF2 Binary Index Category - XML Representation

Draft as of 2026-05-09

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<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="ontoserver-rf2-index"/>
  <text>
    <status value="generated"/>
    <div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: CodeSystem ontoserver-rf2-index</b></p><a name="ontoserver-rf2-index"> </a><a name="hcontoserver-rf2-index"> </a><p>This case-sensitive code system <code>http://ontoserver.csiro.au/syndication/rf2</code> defines the following code:</p><table class="codes"><tr><td style="white-space:nowrap"><b>Code</b></td><td><b>Display</b></td><td><b>Definition</b></td></tr><tr><td style="white-space:nowrap">BINARY<a name="ontoserver-rf2-index-BINARY"> </a></td><td>Binary Index</td><td>A pre-built Ontoserver RF2 binary index — a zip containing the on-disk index Ontoserver derives from a SNOMED CT RF2 release. The companion `category` element's `scheme` attribute carries the binary-format version.</td></tr></table></div>
  </text>
  <url value="http://ontoserver.csiro.au/syndication/rf2"/>
  <version value="0.1.0"/>
  <name value="OntoserverRf2Index"/>
  <title value="Ontoserver RF2 Binary Index Category"/>
  <status value="draft"/>
  <experimental value="false"/>
  <date value="2026-05-09T20:23:33+00:00"/>
  <publisher value="Australian e-Health Research Centre"/>
  <contact>
    <name value="Australian e-Health Research Centre"/>
    <telecom>
      <system value="url"/>
      <value value="https://aehrc.csiro.au"/>
    </telecom>
  </contact>
  <contact>
    <name value="Michael Lawley"/>
    <telecom>
      <system value="email"/>
      <value value="michael.lawley@csiro.au"/>
    </telecom>
  </contact>
  <description
               value="The single category term used by syndication entries that publish a
pre-built **Ontoserver RF2 binary index** — i.e. a zip file
containing the on-disk index Ontoserver builds from a SNOMED CT
RF2 release, ready to be consumed directly without re-indexing.

Consumers that recognise this artefact type can load the index
directly; consumers that do not MUST ignore the entry (the artefact
is not a SNOMED CT RF2 release).

## Wire-level scheme URI

On the wire, the Atom `⟨category⟩` element's `scheme` attribute carries one
of these URIs — not the canonical of this CodeSystem:

- `http://ontoserver.csiro.au/syndication/rf2/1.0.0`
- `http://ontoserver.csiro.au/syndication/rf2/2.0.0`

The trailing path segment is the **binary index format version** —
not the version of the SNOMED CT release contained in the index.
A consumer MUST match the scheme URI exactly: an index published as
`…/rf2/1.0.0` is not interchangeable with one published as
`…/rf2/2.0.0`.

The label paired with this term on the `⟨category⟩` element is conventionally
`Binary Index`."/>
  <caseSensitive value="true"/>
  <content value="complete"/>
  <count value="1"/>
  <concept>
    <code value="BINARY"/>
    <display value="Binary Index"/>
    <definition
                value="A pre-built Ontoserver RF2 binary index — a zip containing the on-disk index Ontoserver derives from a SNOMED CT RF2 release. The companion `category` element's `scheme` attribute carries the binary-format version."/>
  </concept>
</CodeSystem>