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<string-date> Date as a String

Date represented as text.

Usage/Remarks

This element allows dates within the citation elements to be free-form or all text, not constrained by the STS <date> model.
Best Practice While the <string-date> element may be used for any date that is represented as a sequence of characters (i.e., “January, 2001”, “Fall 2001”, “March 11, 2001”), it is best practice, when possible, to tag the year, month, and/or day as numbers, so “January, 2001” would become: 
...
<ref id="B12">
 <label>[12 Lapeyre]</label>
 <element-citation>
  <string-name>Rene Lapeyre du Fontclaire Carnu, IV</string-name>
  <article-title>Foraminifera of the Lower Hellstooth</article-title>
  <source>Local Paleo</source>
  <string-date iso-8601-date="1924-03">
   <month>March</month>, <year>1924</year></string-date>
  <publisher-loc>Rockville, MD</publisher-loc>
 </element-citation>
</ref>
...
Attributes
calendar
content-type
iso-8601-date
specific-use

Base Attributes

id
xml:base
xml:lang
Models and Context
May be contained in
<element-citation>, <mixed-citation>, <related-article>, <related-object>
Description
Any combination of:
Content Model
<!ELEMENT  string-date  (#PCDATA %string-date-elements;)*            >
Expanded Content Model

(#PCDATA | day | era | month | season | year)*

Tagged Sample

Punctuation and spacing in a cited date

...
<ref id="B12">
 <label>[12 Lapeyre]</label>
 <element-citation>
  <string-name>Rene Lapeyre du Fontclaire Carnu, IV</string-name>
  <article-title>Foraminifera of the Lower Hellstooth</article-title>
  <source>Local Paleo</source>
  <string-date iso-8601-date="1924-03">
   <month>March</month>, <year>1924</year></string-date>
  <publisher-loc>Rockville, MD</publisher-loc>
 </element-citation>
</ref>
...