A block of elements defined to be used within a reference citation inside a bibliographic reference (<citation> but not within a <nlm-citation>), but that have other uses as a class
<!ENTITY % references.class
"access-date | annotation | article-title |
collab | comment | conf-date | conf-loc |
conf-name | conf-sponsor | day | edition |
email | elocation-id | etal | ext-link |
fpage | gov | institution | isbn | issn |
issue | issue-id | issue-title |
lpage | month | name | object-id |
page-count | page-range |
patent | person-group | pub-id |
publisher-loc | publisher-name | role |
season | series | source | std |
string-name | supplement | time-stamp |
trans-source | trans-title | uri |
volume | volume-id | year" >default-classes.ent