unit.xml

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<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<dspl targetNamespace="http://www.google.com/publicdata/dataset/google/unit"
      xmlns="http://schemas.google.com/dspl/2010"
      xmlns:entity="http://www.google.com/publicdata/dataset/google/entity">

  <import namespace="http://www.google.com/publicdata/dataset/google/entity"/>

  <info>
    <name>
      <value xml:lang="en">Unit concepts</value>
    </name>
    <description>
      <value xml:lang="en">Concepts for to representing units.</value>
    </description>
    <url>
      <value xml:lang="en">http://code.google.com/apis/publicdata/docs/canonical/unit.html</value>
    </url>
  </info>

  <provider>
    <name>
      <value xml:lang="en">Google Inc.</value>
    </name>
    <description>
      <value xml:lang="en">Google Inc.</value>
    </description>
    <url>
      <value xml:lang="en">http://www.google.com</value>
    </url>
  </provider>

  <concepts>
    <concept id="unit" extends="entity:entity">
      <info>
        <name>
          <value xml:lang="en">Unit</value>
        </name>
        <description>
          <value xml:lang="en">
            Specifies the unit associated with a metric concept.

            Example:

              <![CDATA[<concept id="area_unit" extends="unit:unit">
                <info>
                  <name>
                    <value>Area in square kilometers</value>
                  </name>
                </info>
                <table ref="area_unit_table"/>
              </concept>]]>

            The table contains a single row that contains the property values:

              symbol,symbol_position,unit_text
              km²,END,square kilometers

            One can then use this unit in defining a metric concept:

              <![CDATA[<concept id="country_area" extends="quantity:magnitude">
                <info>
                  <name>
                    <value>Country area in square kilometers</value>
                  </name>
                </info>
                <attribute id="unit" concept="area_unit"/>
                <table ref="country_area_table"/>
              </concept>]]>

          </value>
        </description>
      </info>
      <property id="symbol">
        <info>
          <name>
            <value xml:lang="en">The symbol associated with a unit.</value>
          </name>
        </info>
        <type ref="string"/>
      </property>
      <property concept="symbol_position"/>
      <property id="unit_text">
        <info>
          <name>
            <value xml:lang="en">Unit text</value>
          </name>
          <description>
            <value xml:lang="en">
              Descriptive text that can be displayed next to a value.</value>
          </description>
        </info>
        <type ref="string"/>
      </property>
    </concept>

    <concept id="symbol_position">
      <info>
        <name>
          <value xml:lang="en">Unit symbol position</value>
        </name>
        <description>
          <value xml:lang="en">Unit symbol position</value>
        </description>
      </info>
      <type ref="string"/>
      <defaultValue>END</defaultValue>
      <table ref="unit_symbol_position_table"/>
    </concept>

    <concept id="currency" extends="unit">
      <info>
        <name>
          <value xml:lang="en">Currency unit</value>
        </name>
        <description>
          <value xml:lang="en">
            Specifies the currency associated with a metric concept.
            Each currency is identified by its 3-letter currency code (ISO 4217).
          </value>
        </description>
      </info>
      <table ref="currency_table"/>
    </concept>
  </concepts>

  <tables>
    <table id="unit_symbol_position_table">
      <column id="symbol_position" type="string"/>
      <data>
        <file format="csv" encoding="utf-8">unit_symbol_positions.csv</file>
      </data>
    </table>

    <table id="currency_table">
      <column id="currency" type="string"/>
      <column id="unit_text" type="string"/>
      <column id="symbol" type="string"/>
      <column id="symbol_position" type="string">
        <value>START</value>
      </column>
      <data>
        <file format="csv" encoding="utf-8">currencies.csv</file>
      </data>
    </table>
  </tables>
</dspl>