Crossref 4.4.1 and above now supports an optional ISSN for journals, this is so that journals that do not yet have an ISSN assigned to them can deposit the metadata for the first articles of a new Journal. ISSN are normally assigned after 5 articles have been published by a journal.
As the JATS 1.1 does not make the ISSN optional this PR uses the value of 0000-0000 as a placeholder, as is common practice. Note It is not possible to deposit with Crossref using this placeholder value as it's already been associated with a journal.
Also Crossref have a new release processes which the schema make file uses, note I recommend deleting the subfolders of /schema when updating the XSD/DTD from the sources.
Crossref 4.4.1 and above now supports an optional ISSN for journals, this is so that journals that do not yet have an ISSN assigned to them can deposit the metadata for the first articles of a new Journal. ISSN are normally assigned after 5 articles have been published by a journal.
As the JATS 1.1 does not make the ISSN optional this PR uses the value of 0000-0000 as a placeholder, as is common practice. Note It is not possible to deposit with Crossref using this placeholder value as it's already been associated with a journal.
Also Crossref have a new release processes which the schema make file uses, note I recommend deleting the subfolders of
/schemawhen updating the XSD/DTD from the sources.Closes #162