Wikidata:WikiProject UK and Ireland/monuments/issues

Merging and de-duplication

discussion needed

Examples: should different register entries be merged onto the same item ?

• Listed buildings + scheduled monuments ? -- eg Bradgate House (Q16985100)   , Potter Heigham Bridge (Q17556349)   , Old Scotney Castle (Q17530343)   

  I think the two should be merged as the wikidata item can have separate statements which cover both listing status and scheduled monument status. Richard Nevell (WMUK) (talk) 12:56, 10 November 2015 (UTC)

• Bridges etc that cross between different districts / counties ? -- eg Battersea Bridge (Q810945)   , Battersea Railway Bridge (Q507367)   

  I think the two should be merged as the wikidata item can have separate statements which cover both listing listing entries. Richard Nevell (WMUK) (talk) 12:56, 10 November 2015 (UTC)

• Multiple features on the same site ? (eg building + gate + chapel + ...) -- eg Brocket Hall (Q2663758)   , Benham Park (Q15198400)   , St Bartholomew's Church, Chipping (Q15979318)   

  I would be tempted to leave them separate but make sure that a link is established between the two. Richard Nevell (WMUK) (talk) 12:56, 10 November 2015 (UTC)

• Item for listed thing vs general item for site ? -- eg Hambledon Hill (Q17650608)    vs Hambledon Hill (Q5644220)   

  Yesterday I was using Template:Wikidata list on en.wp to generate a list of hill forts in England. In a couple of cases, sites were effectively listed twice where there was one Wikidata item for the archaeological site and one for the hill which it is a part of. This seemed to derive from Wikipedia articles where the archaeological site was mentioned. I think it makes sense to have separate entries for individual sites and wider areas, so one entry for the hill and one for the hill fort. They still need to be linked so I part of (P361) to link the two, eg Compton Dundon (Q2920303)    and Dundon Hill Hillfort (Q5314880)   . Richard Nevell (WMUK) (talk) 12:56, 10 November 2015 (UTC)

• Buildings and current (or former) uses e.g. The Old Sessions House (Q26513668)    and Museum of Lancashire (Q6940916)    - should these be merged or have separate pages? Peter James (talk) 18:27, 20 September 2017 (UTC)
• Another of these: St Ignatius Church, Preston (Q17532150)    closed a few years ago and the building was taken over by another church, and is now the Syro-Malabar Cathedral of St. Alphonsa, Preston (St Ignatius Church, Preston (Q7593392)   ). City Mosque Preston (Q16884358)    is now City Mosque; the church still exists but has moved from that building. Peter James (talk) 20:42, 20 September 2017 (UTC)

Properties

Some qualifiers that might be useful on merged items, with searches to items demonstrating them

most common qualifiers for property National Heritage List for England number (P1216)

• heritage designation (P1435) -- to distinguish different types of listing -- tinyurl.com/po99mo8
• P794 (P794) -- alternative, to distinguish different types of listing -- tinyurl.com/q33nma2
• located in the administrative territorial entity (P131) -- to distinguish different listings across boundaries -- tinyurl.com/ptks6pk
• applies to part (P518) -- to otherwise indicate different parts -- tinyurl.com/pcbr98t
• official name (P1448) -- to supply names from listing sheet

Useful properties for connecting between different unmerged items

• part of (P361) / has part(s) (P527) -- ? a Commons cat for a structure might include templated links for any listed 'part' of the overall structure
• location (P276) -- perhaps a looser relationship, indicating that an item was merely located in a more general area (use located in the administrative territorial entity (P131) for the district, civil parish, etc)

Principles

• Should a higher-level listed feature in a lower listed surrounding always have a separate item (eg Grade I gates, in a II* complex?)

-- always a specific item for all Grade I features ?

-- but always combine Grade II (unstarred) into an encompassing item ?

• Should scheduled iron-age hill forts generally have a different item to the hill they may almost entirely comprise ?

-- should the hill also get a heritage designation (P1435) statement and National Heritage List for England number (P1216) link ??

Some useful queries

• Identifier lookup tinyurl.com/qjmumke
• "List of listed building" articles with National Heritage List for England number (P1216) values tinyurl.com/oz6t96t (which may duplicate the actual buildings)

eg listed buildings in Alderley Edge (Q15979051)   

• National Heritage numbers having multiple items (excluding lists): tinyurl.com/ouyer7z (latest: 31 rows)

including hill forts Hambledon Hill (Q17650608)    / Hambledon Hill (Q5644220)    ; also eg Abbey House (Q17546103)    / Campsey Priory (Q5028538)   

• Items with multiple National Heritage numbers (excl. lists): tinyurl.com/oomzpw8 (latest: 2045 rows)

  eg: Adlington Hall (Q4683319)   , St Peter's Church, Prestbury (Q7595277)    (nature of the different listings could be clarified)

  • such items with coordinates more than 0.01 degrees apart tinyurl.com/pbs5spv (latest: done, 6 rows) (bad merges)
  • such items with multiple heritage designation (P1435), including scheduled monument (Q219538) tinyurl.com/o846ovo (latest: 344 rows)
  • such items with multiple heritage designation (P1435), not including scheduled monument (Q219538) tinyurl.com/qy2v2xr (latest: 60 rows)
  • such items with multiple located in the administrative territorial entity (P131) tinyurl.com/q482z5q (latest: 29 rows)
  • remainder: tinyurl.com/osjkpzj (1606 rows)
• Items with multiple Commons categories: tinyurl.com/potm7ew (latest: 38 rows) (a lot are imports from incorrect links on Commons)

eg: c:Category:City walls of York & c:Category:Bootham Bar on City Wall From Bootham Bar To Layerthorpe Monk Bar Robin Hoods Tower (Q17530650)   

• Commons cats having more than one item: tinyurl.com/oppbsmz (794 rows) (often an existing WP item + an item created for the listing; however the query above should be investigated first)

eg c:Category:City walls of York and constituents

• Grade I items with images but no Commons cats: tinyurl.com/jvbfvw2

Some things to do

• Add Commons category (P373) based on templates on Commons category pages done
• Identify merge candidates (see above); remove any inappropriate Commons cats
• Better labels (use Commonscats ?)
• Try to add instance of (P31)s based on names, Commons supercats
• Add located in the administrative territorial entity (P131) based on Commons supercats (some P131s that do exist may be also be very general)
• Examine Commons cats of current image (P18) targets, to try to find more Commons category (P373)s ?
• Add named after (P138) dedicated to (P825) statements for churches

Queries

• Items linked from other wikis, but not en-wiki tinyurl.com/ocz5vgf (latest: 13 rows) -- confirm they really aren't on enwiki
• Items with no P31: tinyurl.com/pmxqejf (latest:75000); items with no P31, but with Commons cat tinyurl.com/o4o2cxn (latest:1892)
• Items with an image, but no Commons cat (sorted by Heritage status) tinyurl.com/q3dnz24 (latest 5019)
• Items starting "Church": tinyurl.com/pjfptqe (Labels often confusingly generic)