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genealogy standard GEDCOM X FamilySearch industry proprietary
Extended Date_Time Format EDTF standard specification
Genealogy Citation Standard GEDCOM Mills source templates overview
genealogy standard GEDCOM lines text file
genealogy standard GEDCOM Identifier length size
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genealogy standard naming convention FNU LNU MNU UNK
genealoyg naming standard convention Lnu
genealogy naming standard convention Unk
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Citation Style Language CSL standard XML
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