Names the values which may be used with the date-type attribute of the <history> element. This attribute should only be used if the date is one of the known types.
The <history> element contains one or more <date> elements that record events in the life of a publication. Values for the date-type attribute include: “accepted” (the date the manuscript was accepted), “received” (the date manuscript received), “rev-request” (the date revisions were requested or manuscript was returned), and “rev-recd” (the date revised manuscript was received).
<!ENTITY % date-types "accepted | received |
rev-request | rev-recd" >common.ent