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+# Planned Languages Metadata Readme
+
+This Readme offers explanations for all attributes of the metadata ``.csv`` table to the dataset “Planned Languages.”
+The frequency attribute can have the value "all", "most", "some" or "none". It gives you an overview of how often a value is to be expected for the attribute explained in relation to the whole dataset.
+The CSV is an export of keys and values of the ONB catalogue system. Some values may have a false attribution. Some data cleaning may be necessary. The exemplary data instance was taken from the full metadata ``.csv`` table.
+
+| attribute | explanation | frequency | datatype | exemplary data instance |
+| ---- | ---- | ---- | ---- | ---- |
+| manifest_id | ID in the Austrian National Library’s digital repository, which is the document ID for the access link as well as the IIIF manifest; for this dataset "\d{7}"| all | string |6600051|
+| mms_id | ID of the data record in the integrated library system ALMA (ExLibris group); The ID is the identifier of the local data record (local zone); The MMS-ID may be a value needed for a SRU request | all | string |990005122330603000|
+| barcode | ID of the document; At the Austrian National Library every digitized document in this collection has a barcode as identifier for the digitized item, usually in the form "+Z\d{7}[0-9, A-Z]{1,2}" or a "dummy-barcode" in the form of "alma\d{6}" | all | string |+Z65245606|
+| signature | shelfmark of document in collection of the Austrian National Library | most | string |701820-C-D|
+| location | code for collection department at the Austrian National Library; "ALT FLUG" stands for the Pamphlet Collection of the Collection of Manuscripts and Rare Books | all | string |ESP MAG|
+| urns | ID in the form of a Uniform Resource Name | none | string ||
+| snISBN | International Standard Book Number | none | string ||
+| snISSN | International Standard Serial Number | some | string |1163-0442|
+| volumeNumber | number of volume as part of a multivolumed resource | some | string ||
+| languages | code for language of the document in ISO-639 3 | most | string |epo|
+| main_title | title of the document, either as in the resource or a fictitious title | all | string |Sennaciulo|
+| sub_title | subtitle of the document, either as in the resource or a fictitious subtitle  | most | string |oficiala organo de Sennacieca Asocio Tutmonda|
+| related_title | any other title related to the document | some | string ||
+| countryCodes | code for country, in which borders the place of creation lies at the time the catalogue entry was created; ISO-code preceeded by "XA" | most | string |XA-FR|
+| persons | personal names of creators and other persons involved (e.g. addressees of letters) in the form {surname, forename} OR {surname, forename, dateOfBirth-dateOfDeath, [MARCRelatorsTerm]}; The MARC relators terms are listed in the MARC documentary: https://www.loc.gov/marc/relators/relaterm.html; the values in this dataset are in German | most | string |Barthelmess, Norbert, 1897-1987, Lanti, Eugène, 1879-1947, Vels, Bas, Barkovi?, Krešimir, Schram, Jakvo, Beto, Robin, Sanz, Pedro|
+| corperations | personal name of corporation involved | none | string ||
+| publishers | personal name of publisher if known | most | string |Sennacieca Asocio Tutmonda|
+| placesOfPublication | placename for place of creation or place of publication, not linked to authority file | most | string |Paris|
+| yearOfPublication | year of creation of the document | most | string |1925-|
+| dateOfPublication | | none | integer ||
+| Subjects | subject terms in German | most | string |dokumento Esperanta, Esperanto|
+| GND-Links | URLs (PIDs) for GND-referenced subject terms; multiple values are comma separated | some | string |http://d-nb.info/gnd/4063783-9, http://d-nb.info/gnd/4313218-2|
+| gndReferences | references to the GND (Gemeinsame Normdatei, “common authority file”) | some | string ||
+| classifications | classifications of the documents | some | string |BASISKLASSIFIKATION: 18.97, REGENSBURGER_VERBUNDKLASSIFIKATION: 680|
+| contentInformations | description of the document | some
+ | string |Red.: Norbert Barthelmess: 1924-1925, 1928-1939, 1948-1982 ; Ivan Krestanov: 1926 ; Lanti: 1926 - 1928 ; Bas Vels: 1939 - 1948 ; Lucien Bannier: 1946 - 1948 ; Kre?imir Barkovi?: 1983 - 2006, 2007 - 2008 ; Cirilo Orsinger: 2007 ; Jakvo Schram: 2008 - 2011 ; Robin Beto: 2011 - 2014|
+| physicalPages | number of pages or description of quantity of material | most | string ||
+| illustrations | information about the illustrations | some | string ||
+| physicalFormat | dimensions of the leaves in centimeter | some | string ||
+| sequence | NA | none | string ||
+| urls | URL to entry in ÖNB Digital  | most | string |http://data.onb.ac.at/dtl/6595561, http://data.onb.ac.at/dtl/6599739, http://data.onb.ac.at/dtl/6600051, http://data.onb.ac.at/dtl/6601933, http://data.onb.ac.at/dtl/6552673, http://data.onb.ac.at/dtl/6551030, http://data.onb.ac.at/dtl/6713494, http://data.onb.ac.at/dtl/6722220|
+| idnr |  ID for the MARC record in the Austrian Union Catalogue; Please refer to this ID for the bibliographic description in the public catalogue (OPAC) | all | string |AC02709315|