Wikidata:WikiProject Städel Museum Wikidata Clean-Up/tab2
Scope and nature of the clean-up[edit]
Scope: For this pilot we focused on a small set of highlight artworks from our collection. We only addressed statements that referenced the Städel Museum as a source, and decided to limit the clean-up to statements made using the properties listed in the table below. We have not touched any other statements, as this information was not part of our project, but part of other users' research.
Nature of the clean-up: We compared the existing wikidata statements to our current data. Where the statements were already up-to-date, we added a new reference using our updated permalink urls (https://staedelmuseum.de/go/ds/xxx). Where more recent data was available we added a new statement with the updated information, referenced with our permalink url. We haven't removed any old out-dated statements, we just gave our updated statements a preferred rank (Help:Ranking).
| Wikidata property | Städel Museum data field | Comment |
|---|---|---|
| instance of (P31) | "Object Type" / "Objektart" | Consulted Wikidata:WikiProject_Visual_arts/Item_structure#Types_of_visual_artworks. |
| inception (P571) | "Date" / "Datum" (date) | Where the exact date of creation is not known, we followed the conventions described at Help:Dates#Inexact_dates |
| image (P18) | If not already in place, we added a statement connecting to the file with highest resolution image available on commons. | |
| title (P1476) | "Title" / "Titel" (title_en, title_de) | |
| location (P276) | "Institution" | In every case this was Städel Museum (Q163804) |
| genre (P136) | "Genre" / "Motivgattung" (motiv_general) | We learned that the community around Wikidata:WikiProject_sum_of_all_paintings aims to restrict entries for genre to a limited list wherever possible, to make it possible to effectively query using these statements. Most used genres can be found at Wikidata:WikiProject_sum_of_all_paintings/Top_genres.
However, our data generally includes multiple entries for the genre data field, and these can be difficult to map to the preferred options from the wikidata community. Each artwork needed to be researched individually. We did not establish a consistent strategy for the use of this property during this pilot. |
| main subject (P921) | "Main motif" / "Motiv" (motiv_specific) | Similar to genre (P136), we learned that, to support effective querying, the community tries to control the entries for this property. Artworks should, wherever possible, only list one main subject (in rare cases more than one) and, wherever possible, this should be limited to the most frequently used main subjects detailed in the lists at Wikidata:WikiProject_sum_of_all_paintings/Main_subject. (Thanks to @multichill for the hint)
However, our data doesn't specify a single main motif. Instead we list multiple entries for this field. This meant that, for each artwork, we had to research a suitable term. Again, we struggled to establish a consistent approach during the pilot. |
| depicts (P180) | "Main motif" / "Motiv" (motiv_specific) | In wikidata the constraints for use of this property are much looser. It's possible to add multiple depicts statements and the values need not be limited to any pre-defined lists.
We used this property to add further items from our "main motif" field. Although, again, due to the difficulties with the main subject (P921) statements, we didn't manage to be very consistent in this. |
| creator (P170) | (creator) | In most cases this was straightforward. Where not, we consulted Wikidata:WikiProject_Visual_arts/Item_structure#Use_of_creator_(P170)_in_uncertain_cases |
| inventory number (P217) | (object_number) | |
| made from material (P186) | "Physical Description" / "Material und Technik" | Whilst the wikidata property made from material (P186) should focus materials only, our data includes widely-used standardised terms like mixed technique (Q17141444) that cover both material and techniques used. Mapping our data to wikidata required us to research options for many artworks individually. Again, we struggled to be consistent with our use of this property for this pilot. |
| width (P2049), height (P2048), diameter (P2386), thickness (P2610) | "Dimensions" / "Maße" | Consulted Wikidata:WikiProject_Visual_arts/Item_structure#Dimensions. |
| depicts Iconclass notation (P1257) | Iconclass | Here we listed both primary and secondary iconclass statements according to our database. |
| described at URL (P973) | Permalink | We added statements for our new permalink with the qualifiers: |
| copyright status (P6216) | "Picture Copyright" / "Bildrechte" | All artworks in this pilot are already in the public domain (Q19652).
We were advised to qualify this statement with the following qualifiers:
However, as we are in the European Digital Single Market and all our works become public domain 70 years after the death of the artist, we are unsure it this was the right thing to do (see comment below). |
| on focus list of Wikimedia project (P5008) | In every case this was WikiProject Städel Museum Wikidata Clean-Up (Q124393172) |