<idno>

<idno> (identifying number) supplies any standard or non-standard number used to identify a bibliographic item. 2.2.4 Publication, Distribution, etc. 2.2.5 The Series Statement 3.11.2.3 Imprint, Pagination, and Other Details
Moduleheader — 2 The TEI Header
AttributesIn addition to global attributes
typecategorizes the number, for example as an ISBN or other standard series.
Status Optional
Datatype 

<rng:ref name="data.enumerated"/>
data.enumerated
Values A name or abbreviation indicating what type of identifying number is given (e.g. ISBN, LCCN).
Used byaltIdentifier biblStruct msIdentifier seriesStmt model.biblPart model.publicationStmtPart
May containCharacter data only
Declaration

<rng:element name="idno">
<rng:ref name="att.global.attributes"/>
<rng:optional>
 <rng:attribute name="type">
  <rng:ref name="data.enumerated"/>
 </rng:attribute>
</rng:optional>
<rng:text/>
</rng:element>
element idno
{
   att.global.attributes,
   attribute type { data.enumerated }?,
   text
}
Example
<idno type="ISSN">0143-3385</idno>
<idno type="OTA">116</idno>