The identification information (typically the standard number, organization name, and title of the standard) for a cited standard, where “standard” is defined as a document produced by a recognized standards body such ISO, IEEE, OASIS, ANSI, etc.
<!ELEMENT std (#PCDATA %std-elements;)* >
Any combination of:
<citation> Citation; <related-article> Related Article Information; <related-object> Related Object Information
In a bibliographic reference (punctuation and spacing removed):
...
<ref>
<citation>
<std>International standard ISO 10993-10:2002(E): Biological
evaluation of medical devices-Part 10: Tests for irritation and
delayed-type hypersensitivity</std>
<edition>Second</edition>
<year>2002</year>
<month>09</month>
<day>01</day>
</citation>
</ref>
...
In a bibliographic reference (punctuation and spacing preserved):
...
<ref>
<citation>
<std>International standard ISO 10993-10:2002(E): Biological
evaluation of medical devices-Part 10: Tests for irritation and
delayed-type hypersensitivity</std>. <edition>Second</edition>.
<year>2002</year>-<month>09</month>-<day>01</day>.
</citation>
</ref>
...
references.ent