Difference between revisions of "FactGrid:Data modeling"

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One of the problems is here also: How do I select a family of items?
One of the problems is here also: How do I select a family of items?
== The situation at a moment in history ==

Revision as of 13:08, 20 April 2020

The Problem of on-and off existence

Goths's Lodge Lodge "Ernst zum Kompaß", Gotha (Q10575) is a typical example: it has a starting point begin date (P49) but actually several new starts and more than one end end date (P50). People found a lodge, the lodge is closed (in the events of the French Revolution), it re-opens in the national wave of the Napoleonic wars, it is closed again in 1935 and re-eopened in 1949 or later or never.

Is it always the same lodge? What do we do with changing names? The German National Library creates loads of items under ever new names - and you have to make sure to get the respective successions. The alternative: If those involved wanted to state that they actually are the same people (even if that is only a fiction of continuity) let them:

The present solution: We have started to use history (P137) "History" and active phase (Q94446) "active phase":

See Lodge "Ernst zum Kompaß", Gotha (Q10575) Lodge "Ernst zum Compaß", Gotha

We can now use qualifiers on each active phase in order to state a respective beginning and a respective end. Is this a good option? How does it work in SPARQL searches if you want to give a time line? How does the option agree with the general P49/P50 use on items?

Changing names

An organisation can run through dozens of name changes over the years - e.g. an Early Modern Publishing house with name changes whenever a father hands down the business to son, wife, son in law etc.

We are presently using <naming> (P57) for a history of naming but that is not ideal since usual searches will not get to the the right names at the right moment.


Ernst Howald and Henry E. Sigerist. Antonii Musa De herba vettonica ... Leipzig 1927

We created two properties for this: preceding in stemma (P233) names the object - a book edition, a manuscript or any other thing that is genetically earlier. connection in stemma (P234) comes as the qualifier and offers a statement on what basis the object can be seen as a following. You might for instance link a translation to the edition that gave the original text.

The organisation is top down chronological (the guide lines in the picture above are not that beautiful, but dates on y-axis would be cool).

Objects can have multiple connections to earlier Items (a medieval scribe could use two books to create a new version of the text).

It would be cool if the P234 information became available on the lines that ar connecting items.

One of the problems is here also: How do I select a family of items?

The situation at a moment in history