The Inter-Parliamentary Union (IPU) new version of the Parline database is a treasure-trove of information about parliaments worldwide. It allows searches by categories such as region and provides some very nice visualisation tools to present the data.
It is a good source of practical information – this search, for example, gives a list of all the parliamentary websites worldwide.
Parline is based mainly on survey of parliamentary administrations, which is both a strength and weakness. The strength is in the accuracy, currency and authority of the data. (For an example of a weakness, try this Data Explorer search on basic salaries of parliamentarians in Europe )
Unfortunately, so far as I can find, there is no data on library and research services. Perhaps a question could be included in future?
There is more background information below, and a communication to IFLAPARL about the new database is here. The database was presented at the IFLAPARL conference in Athens in August 2019.
“New Parline is the IPU’s open data platform on national parliaments. It allows you to consult and compare data on national parliaments including information on structures, working methods, gender parity, women’s caucuses, youth and MPs’ human rights.
The platform is aimed at parliamentarians, academics, international and civil society organizations and the general public.
Some of the data goes back several years allowing you to see evolutions and trends over time. Much of the data is unique and only available on New Parline.
Generally, the information on the platform comes from national parliaments directly. It is updated regularly to take into account any changes that result from elections. The data covers a wide range of themes; for example, the number of chambers, the number of women MPs, the number of laws initiated by parliament and the average age of MPs.