Tag Archives: linked open data

Documenting public art, on Wikipedia

Wikipedia has a number of articles listing public artworks (statues, murals, etc) in counties, cities and towns, around the world. For example, in Birmingham. There’s also a list of the lists.

Gilded statue of three men

Boulton, Watt and Murdoch (1956) by William Bloye.
Image by Oosoom, CC BY-SA 3.0

There are, frankly, not enough of these articles; and few of those that do exist are anywhere near complete (the best is probably the list for Westminster).

How you can help

I invite you to collaborate with me, to make more lists, and to populate them.

You might have knowledge of your local artwork, or be able to visit your nearest library to make enquiries; or to take pictures (in the United Kingdom, of “permanent” works, for copyright reasons — for other countries, read up on local ‘Freedom of Panorama‘) and upload them to Wikimedia Commons, or even just find coordinates for items added by someone else. If you’re a hyperlocal blogger, or a journalist, perhaps you can appeal to your readership to assist?

Practical steps

You can enter details of an artwork using the “Public art row” family of templates. A blank entry looks like:


{{Public art row
| image =
| commonscat =
| subject =
| location =
| date =
| show_artist= yes
| artist =
| type =
| material =
| dimensions =
| designation =
| coordinates =
| owner =
| show_wikidata= yes
| wikidata =
| notes =
}}

(change “yes” to “no” if a particular column isn’t wanted) and you simply type in the information you have, like this:


{{Public art row
| image = Boulton, Watt and Murdoch.jpg
| commonscat = Statue of Boulton, Watt and Murdoch, Birmingham
| subject = ''[[Boulton, Watt and Murdoch]]''
| location = Near the House of Sport – Broad Street
| date = {{Start date|1956}}
| artist = [[William Bloye]]
| type = statue
| material = Gilded [[Bronze]]
| dimensions = 10 feet tall
| designation = Grade II listed
| coordinates = 52.478587,-1.908395
| owner = [[Birmingham City Council]]
| show_wikidata= yes
| wikidata = Q4949742
| notes = <ref>http://www.birminghammail.co.uk/whats-on/things-to-do/top-5-statues-birmingham-5678972</ref>
}}

Apart from the subject, all the values are optional.

In the above (as well as some invented values for illustrative purposes):

but if that’s too complicated, you can just enter text values, and someone else will come along and do the formatting (experienced Wikipedians can use the {{Coord}} template for coordinates, too). If you get stuck, drop me a line, or ask for help at Wikipedia’s Teahouse.

What this does

The “Public art row” template makes it easy to enter data, keeps everything tidy and consistently formatted, and makes the content machine-readable, That means that we can parse all the contents and enter them into Wikidata, creating new items if required, as we go.

We can then include other identifiers for the artworks in Wikidata, and include the artworks’ Wikidata identifiers in other systems such as OpenStreetMap, so everything becomes available as linked, open data for others to reuse and build new apps and tools with.

United Kingdom parliamentary URL structure: change needed

In Wikidata, Wikipedia’s sister project for storing statements of fact as , we record a number of unique identifiers.

For example, Tim Berners-Lee has the identifier “85312226” and is known to the as “nm3805083”.

We know that we can convert these to URLs by adding a prefix, so

by adding the prefixes:

  • https://viaf.org/viaf/
  • http://www.imdb.com/Name?

respectively. We only need to store those prefixes in Wikidata once each.


HOUSES OF PARLIAMENT DSC 7057 pano 2

The in August 2014,
picture by Henry Kellner, CC BY-SA 3.0

The United Kingdom Parliament website also uses identifiers for MPs and members of the House of Lords.

For example, Tom Watson, an MP, is “1463”, and Jim Knight, aka The Lord Knight of Weymouth, is “4160”.

However, the respective URLs are:

meaning that the prefixes are not consistent, and require you to know the name or exact title.

Yet more ridiculous is that, if Tom Watson ever gets appointed to the House of Lords, even though his unique ID won’t change, the URL required to find his biography on the parliamentary website will change — and, because we don’t know whether he would be, say Lord Watson of Sandwell Valley, or Lord Watson of West Bromwich, we can’t predict what it will be.

When building databases, like Wikidata, this is all extremely unhelpful.

What we would like the parliamentary authorities to do — and what would benefit others wanting to make use of parliamentary URLs — is to use a standard, predictable type of URL, for example http://www.parliament.uk/biographies/1463 which uses the unique identifier, but does not require the individual’s house, name or title, and does not change if they shift to “the other place”.

If necessary they could then make that redirect to the longer URLs they prefer (though I wouldn’t recommend it).

I’ve asked them; but they don’t currently do this. In fact they explained their preference for the longer URLs thus:

…we are unable [sic] to shorten the url any further as the purpose of the current pattern of the web address is to display a pathway to the page.

The url also identifies the page i.e the indication of biographies including the name of the respective Member as to make it informative for online users who may view the page.

I find these arguments unconvincing, to say the least.


Screenshot, with Watson's name in the largest font on the page

There’s a big enough clue on the page, without needing to read the URL to identify its subject

Furthermore, the most verbose parts of the URLs are non-functioning; if we truncate Tom’s URL by simply dropping the final digit: http://www.parliament.uk/biographies/commons/tom-watson/146, then we get the biography of a different MP. On the other hand, if we change it to, say: http://www.parliament.uk/biographies/commons/t/1463, we still get Tom’s page. Try them for yourself.

So, how can we help the people running the Parliamentary website to change their minds, and to use a more helpful URL structure? Who do we need to persuade?