std-id-type Standard Identifier Type

What type of identifier is named in the <std-id> element, for example, “dated”.

Usage/Remarks

The values for this attribute (and the @std-relationship-type attribute) answer requirements of the Crossref Standards Working Group to support NSB adoption or co-published standards documents that are equivalent, to allow both a designation and an alternative designation when, for example, a single document is co-published, but has a different designator for each of the co-publishing bodies.
REQUIRED on element: <std-id>
Value Meaning
Text, numbers, or special characters The type of identifier expressed in a <std-id> element, for example, “undated” or “short”.
Restriction This is an optional attribute; there is no default.

Suggested usage

Best Practice: Although this attribute may take any text as values, the suggested values are:
undated
The <std-id> refers to a standard designation without specifying a date (“ISO 9100”).
dated
The <std-id> refers to the specific dated designation/version of a standard (“ISO 9100:2015”).
alt-dated
The <std-id> refers to a different designation of a specific-dated-version of a standard than is specified in the “dated” value.
alt-undated
The <std-id> refers to different designation of a specific undated version of a standard, than the “undated” value.
short
The <std-id> is for a standards document’s family or series short designation.
Tagged Sample

Dated and undated <std-id>s

...
<std-id-group 
  std-relationship-type="std-as-published">
 <std-id 
   std-id-type="dated">ASME A17.1-2013/CSA B44-13</std-id>
 <std-id 
   std-id-type="dated" 
   std-id-link-type="doi">10.1115/ASME A17.1-2013/CSA B44-13</std-id>
</std-id-group>

<std-id-group 
  std-relationship-type="std-as-published">
 <std-id 
   std-id-type="undated">ASME A17.1/CSA B44</std-id>
 <std-id 
   std-id-type="undated" 
   std-id-link-type="doi">10.1115/ASME A17.1/CSA B44</std-id>
</std-id-group>

<std-id-group 
  std-relationship-type="as-published">
 <std-id 
   std-id-type="short" 
   std-relationship-type="std-family">A17</std-id>
 <std-id 
   std-id-type="short" 
   std-id-link-type="doi">10.1115/ASME.A17</std-id>
</std-id-group>

<std-id-group 
  originator="CSA" 
  std-relationship-type="std-alt-as-published">
 <std-id 
   std-id-type="dated">CSA B44-13</std-id>
 <std-id 
   std-id-type="dated" 
   std-id-link-type="doi">10.XYZ/CSA.B44-13</std-id>
</std-id-group>
...