Hello
I've been doing a little research for an internal training workshop; I found that several Dublin Core properties are not described in detail in the OPF specification... nor could I find any specific examples of usage. The specification also provides for two optional attributes: xml:lang and xsi:type and I'm having trouble finding usage examples of the latter.
I've constructed the following metadata entries based on my present understanding of the Dublin Core documentation. Any suggestions, corrections (especially corrections!) or links to further reading material would be sincerely appreciated!
The dc:date property
Possible usage:
Code:
<dc:date opf:event="publication" xsi:type="dcterms:W3CDTC">2017-06-14</dc:date>
The dc:type element
I haven't seen this property used in any ebook, yet it seems fairly straightforward..
Possible usage:
Code:
<dc:type xsi:type="dcterms:DCMIType">text</dc:type>
The dc:format element
I haven't seen this used anywhere either..
Possible usage:
Code:
<dc:format xsi:type="dcterms:IMT">application/epub+zip</dc:format>
The dc:language element
This, of course is a mandatory element; in this case, my question is that RFC3066 has been made obsolete, first by RFC4646 then RFC5646... so is this code correct:
Code:
<dc:language xsi:type="dcterms:RFC3066">en</dc:language>
or should it be:
Code:
<dc:language xsi:type="dcterms:RFC5646">en</dc:language>
The dc:source element
I'm presuming that the ISBN of the print book from which the ebook is created might be listed here. In that case, how does the xml:lang attribute refine the value of this property?
The dc:identifier element
This, of course, is a mandatory element but the OPF specification clearly states that the identifier may have an xsi:type attribute but I can't find any other information about this.
Last of all, I've sort of given up on the dc:relation and dc:coverage elements... unless someone could give me an example of appropriate usage, please?
Any suggestions and thoughts sincerely appreciated!
Cheers
Nabodita