This attribute holds the DOI (Digital Object Identifier) of the section. This must be unique for the section, and this is usually achieved simply by appending the section identifier onto the end of the article DOI:

doi="10.1081/SAP-120028028-S0001"

Defined in shared attribute group: "Section Attributes"

This attribute is not required. It has text content.

The DTD contains the following attribute definition (note that embedded links are to definitions within the DTD page of this guide):

                doi                      CDATA  #IMPLIED