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This is Dublin Core XML. Note how every field wrapper clearly indicates the content of the field. If I want all title fields, for example, I write code to retrieve all dc:title nodes. Easy.On Internet Archive
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This is MarcXML. Note how every field wrapper has the same name and is only differentiated by numeric tag attributes. To get title fields, I have to look at every datafield, check if the tag of that field == 245, and then retrieve all subfields.Permalink On Internet Archive
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Don't even get me started on retrieving 880 fields and the nonsense way they correspond to other fields. There are better ways to store metadata than Marc.Permalink On Internet Archive