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std-org-level Standards Organization Hierarchical Level

Used on the <std-org> element, which can name a nested hierarchy, to indicate the level of nesting standards bodies. Such groups start at “1”, with embedded groups taking higher numbers.
OPTIONAL on element: <std-org>
Value Meaning
Text, numbers, or special characters Typically a counting number that names the level, such as “1”.
Restriction This is an optional attribute; there is no default.
Tagged Sample

Both first and second standards bodies

...
<std-org-group>
 <std-org std-org-type="sdo" std-org-role="co-producer" std-org-level="1">
  <std-org-name>American Society of Mechanical Engineers</std-org-name>
  <std-org-abbrev>ASME</std-org-abbrev>
  <std-org-loc
   ><addr-line>2 Park Ave.</addr-line>
   <city>New York</city>
   <state>NY</state>
   <postal-code>10016</postal-code>
   <uri>https://www.asme.org/</uri></std-org-loc>
 </std-org>

 <std-org std-org-type="sdo" std-org-role="co-producer" std-org-level="2">
  <std-org-name>American Petroleum Institute</std-org-name>
  <std-org-abbrev>API</std-org-abbrev>
  <std-org-loc
   ><addr-line>1220 L Street, N.W.</addr-line>
   <city>Washington</city>
   <state>D.C.</state>
   <postal-code>20005</postal-code>
   <uri>http://www.api.org/</uri></std-org-loc>
 </std-org>
</std-org-group>
...