Current Build 

{
  "resourceType" : "ValueSet",
  "id" : "encounterPriority",
  "meta" : {
    "profile" : [
      "http://hl7.org/fhir/StructureDefinition/valueset-shareable-definition"
    ]
  },
  "text" : {
    "status" : "generated",
    "div" : "<div xmlns="http://www.w3.org/1999/xhtml"><h2>HSPC Encounter Priority value set.</h2><div><p>SELECT SNOMED CT code system values descending from 'Priorities' (272125009).</p>
</div><p><b>Copyright Statement:</b> TBD</p><p>This value set includes codes from the following code systems:</p><ul><li>Include codes from <a href="http://www.snomed.org/"><code>http://snomed.info/sct</code></a> where concept  is-a  272125009 (Priorities)</li></ul></div>"
  },
  "extension" : [
    {
      "url" : "http://hl7.org/fhir/StructureDefinition/valueset-extensible",
      "valueBoolean" : true
    }
  ],
  "url" : "http://hl7.org/fhir/fpar/ValueSet/encounterPriority",
  "version" : "0.01",
  "name" : "HSPC Encounter Priority value set.",
  "status" : "draft",
  "date" : "2015-12-03T00:00:00-05:00",
  "publisher" : "Health Services Platform Consortium (HSPC)",
  "description" : "SELECT SNOMED CT code system values descending from 'Priorities' (272125009).",
  "immutable" : true,
  "copyright" : "TBD",
  "extensible" : true,
  "compose" : {
    "include" : [
      {
        "system" : "http://snomed.info/sct",
        "filter" : [
          {
            "property" : "concept",
            "op" : "is-a",
            "value" : "272125009"
          }
        ]
      }
    ]
  }
}