namespace open = "http://a9.com/-/spec/opensearch/1.1/"

# Open Search
start = osTotalResults | osStartIndex | osItemsPerPage | osQuery
osTotalResults = element open:totalResults { xsd:int }
osStartIndex = element open:startIndex { xsd:int }
osItemsPerPage = element open:itemsPerPage { xsd:int }
osQuery =
  element open:Query {
    attribute role { roleValue },
    attribute title {
      xsd:string { maxLength = "256" }
    }?,
    attribute totalResults { xsd:int }?,
    attribute searchTerms { text }?,
    attribute count { text }?,
    attribute startIndex { text }?,
    attribute startPage { text }?,
    attribute language { text }?,
    attribute inputEncoding { text }?,
    attribute outputEncoding { text }?
  }
roleValue = "request" | "example" | "related" | "correction" | "subset" | "superset"