Used to record the type of publication that was released on a particular date, for example, a print-only publication versus an electronic-only publication
| Value | Meaning |
|---|---|
| Text, numbers, or special characters | The type of print or electronic publication, for example, “epub” for electronic publication. This attribute may take any value, but see the list of suggested values below. |
| Restriction: This attribute may be specified if the element is used. | |
Although designed to accept any text as its value, potential values for this attribute might include:
|
epub |
Electronic publication (usually web, but also includes CD-ROM or other electronic only distribution) |
|
ppub |
Print publication |
|
epub-ppub |
Both print and electronic publications |
|
epreprint |
Electronic preprint dissemination |
|
ppreprint |
Print preprint dissemination |
|
ecorrected |
Corrected in electronic |
|
pcorrected |
Corrected in print |
|
eretracted |
Retracted in electronic |
|
pretracted |
Retracted in print |