stortingscrape: An R package for accessing data from the Norwegian parliament
Source:vignettes/stortingscrape.Rmd
stortingscrape.RmdIntroduction: Retrieval of Storting data in R
A wide variety of parliamentary data have been made available to the public in several countries over the last decade. Be it through frontend websites or back-end APIs, researchers on parliaments have never had easier access to large amounts of data than they do now. However, both frontend and API scraped data often come in formats (.html, .xml, .json, etc) that require substantial structuring and pre-processing before they are ready for subsequent analyses.
In this vignette, I present the stortingscrape package
for R. stortingscrape makes retrieving data from the
Norwegian parliament (Stortinget) through their easily
accessible back-end API. The data requested using the package require
little to no further structuring. The scope of the package, discussed
further below, ranges from general data on the parliament itself (rules,
session info, committees, etc) to data on the parties, bibliographies of
the MPs, questions, hearings, debates, votes, and more.
Although this is the first attempt to make data on
Stortinget more easily accessible, stortingscrape
does not live in a vacuum. A variety of parliamentary data for different
countries are available for researchers to use freely. For parliamentary
debates, Thomas, Pang, and Lee (2006) were
one of the first to gather and make available data. Their data cover the
proceedings of the 2005 House debates. Eggers and
Spirling (2014) structured the UK Hansard speech data, which
spans from 1802 to 2010. Beelen et al.
(2017) provided continuously updated data for the Canadian
parliament, Rauh and Schwalbach (2020)
made available a collection of speech data from 9 countries, and Turner-Zwinkels et al. (2021) developed a
day-by-day dataset of MPs in Germany, Switzerland, and the Netherlands,
in the period between 1947 and 2017. These examples are, however,
different from stortingscrape in that they are finished
datasets ready for download and have limited scope.
The main goal of stortingscrape is to allow researchers
to access any data from the Norwegian parliament easily, but also still
be able to structure the data according to ones need. Most importantly,
the package is facilitated for weaving together different parts of the
data.stortinget.no API.
I will start this vignette by briefly discussing the openly
accessible data.stortinget.no API. Next, I will describe the philosophy,
scope and general usage of the stortingscrape package.
Finally, I will present some minimal examples of possible workflows for
working with the package, before I summarize.
Stortinget’s API
The Norwegian parliament was comparatively early in granting open
access to their data through an API when they launched data.stortinget.no in 2012. The
general purpose of the API is to priovide transparency in the form om
raw data, mirroring the frontend web-page information from stortinget.no. The format of the API
has been fairly consistent over the time of its existance, but there
have been some small style changes over different versions.1
stortingscrape was built under version
of the API.
Except for content that is blocked for the public (e.g. debates behind closed doors), the API contains all recorded data produced in Stortinget. These data include data on individual MPs, transcripts from debates, voting results, hearing input, and much more. For a exhaustive list of all data sources in the API.2 The data available in the API can be accessed through XML of JSON format3, both of which are flexible formats for compressing data in nested lists.
As an exmple, the raw data input for general information about a single MP4 looks like this:
#> <person>
#> <respons_dato_tid>2021-08-13T14:59:48.2114895+02:00</respons_dato_tid>
#> <versjon>1.6</versjon>
#> <doedsdato>0001-01-01T00:00:00</doedsdato>
#> <etternavn>Aasen</etternavn>
#> <foedselsdato>1967-02-21T00:00:00</foedselsdato>
#> <fornavn>Marianne</fornavn>
#> <id>MAAA</id>
#> <kjoenn>kvinne</kjoenn>
#> </person>This is the typical XML structure in the API, although other parts of the data are more complex in that the XML tree can be nested multiple times. This will be discussed further in the next section.
Package philosophy, scope, and usage
stortingscrape aims to make Norwegian parliamentary data
easily accessible, while also being flexible enough for tailoring the
different underlying data sources to ones needs. Indeed, contrary to
most open source parliamentary speech data, stortingscrape
aims at giving the user as much agency as possible in tailoring data for
specific needs. In addition to user agency, the package is built with a
core philosophy of simplifying data structures, make seamless workflows
between different parts of the Storting API, and limit data
duplication between functions.
Because a lot of analysis tools in R requires 2 dimensional data
formats, the stortingscrape package prioritize converting
the nested XML format to data frames, when possible. However, some
sources of data from the Storting API are nested in a way which makes
retaining all data in a 2 dimensional space either impossible or too
verbose. For example, the get_mp_bio() function, which
extract a specific MP’s biography by id, has data on MP personalia,
parliamentary periods the MP had a seat, vocations, literature authored
by the MP, and more. In order to make all these data workable, the
resulting format from the function call is a list of data frames for
each part of the data. The different list elements are, however, easily
combined for different applications of the data.
One of the core thoughts behind the workflow of the package is to
make it easy to combine different parts of the API and to extract the
data you actually need. To facilitate this, most functions within
stortingscrape are built to work seemlessly with the
apply() family or control flow constructs in R. Because we
do not want to call the API repeatedly, functions that are expected to
often be ran repeatedly have a good_manners argument. This
will make R sleep for the set amount of seconds after calling the API.
It is recommended to set this argument to 2 seconds or higher on
multiple calls to the API. Generally, the package is built by the
recommendations given by the httr2 package (Wickham 2023)5.
Most of the data from Stortinget’s API and frontend web page are
interconnected through ids for the various sources (session id, MP id,
case id, question id, vote id, etc.). stortingscrape core
extraction methods are based around these. One of the major benefits of
this is that whether you want to extract, for instance, a single
question found on the frontend web page, or all questions for a
parliamentary session, the package is flexible enough to suit both needs
(see the workflow section). It will also enable
users to quickly retreive data from the frontend web-page.6
Because of the interconnectedness of the API’s data, there are some
overlapping sources of data. For instance, both retreival of MP general
information (get_mp()), biography
(get_mp_bio()), and all MPs for a session
(get_parlperiod_mps()) have the name of the MP in the API,
but only get_mp() will return MP names in
stortingscrape, because these two data sources are easily
merged by the MP’s id (see the workflow
section).
The scope of stortingscrape is almost the entire API of
Stortinget, with some notable shortcomings. First, there are no
functions for dynamically updated data sources, such as current speaker
lists (https://data.stortinget.no/dokumentasjon-og-hjelp/talerliste/).
Second, as mentioned above, duplicated data i avoided whenever possible.
Third, certain unstandardized image sources – such as publication
attachment figures – are not supported in the package. And finally,
publications from the get_publication() function can be
retrieved, but are returned in a parsed XML data format from the
rvest package because these data are not standardized
across different publications.
There are three overarching sources of data in
stortingscrape: 1) Parliamentary structure data, 2) MP
data, and 3) Parliamentary activity data. These are, in some/most cases,
linked by various forms of ID tags. For example, retrieving all MPs for
a given session (get_parlperiod_mps()) will give access to
MP IDs (mp_id) for that session, which can be used to
extract biographies, pictures, speech activity, and more for those MPs.
Next, I will showcase some examples of how a typical workflow for using
stortingscrape could look like.
Workflow
In the following section, I will discuss some examples of data
extraction with stortingscrape. I start by showing basic
extraction of voting data based on vote IDs from the frontend web-page –
stortinget.no. Next, I exemplify the
large set of period and session specific data by retrieving all MPs for
a specific parliamentary period and all interpellations for a specified
parliamentary session. Finally, I show how the different functions of
the stortingscrape package works together – merging data on
cases with their belonging vote results. Note that the vignette is built
using the examples in the data folder of the package.7
Basic extraction
The basic extraction of specific data from Stortinget’s API revolves around various forms of ID tags. For example, all MPs have a unique ID, all cases have unique IDs, all votes have unique IDs, and so on. For the following example, I will highlight going from a case on economic measures for the Covid pandemic to party distribution on a specific vote in this case. First, the case was relatively rapidly proposed and treated in the Storting during the early days of June 2021. The case in its entirety can be found at here. You will see the procedure steps from a government proposal, through work in the finance committee, to debate and decision. Lets say a particular proposal under the case caught our eye – for instance, vote number 61 from the Labor Party asking the government to propose a plan for implementing the International Labor Organization’s core conventions to the Human Rights Act (menneskerettighetsloven).
As can be seen from the link to the case itself, we have an ID within
the URL: “85196”. This is the case ID. We can use the
get_case() function from stortingscrape to
extract all votes on this case:
## covid_relief <- get_vote("85196")We now have a data frame with 71 votes over 22 variables. The data structure for some selected variables, looks like this:
head(covid_relief[, c("case_id", "vote_id", "n_for", "n_against", "adopted")])
#> case_id vote_id n_for n_against adopted
#> 1 85196 17631 1 87 false
#> 2 85196 17632 6 81 false
#> 3 85196 17633 14 74 false
#> 4 85196 17634 42 46 false
#> 5 85196 17635 40 48 false
#> 6 85196 17636 15 73 falseAs we are interested in the result of proposal 217 from the Labor Party, we can extract the ID of this particular vote from our data:
To get the personal MP vote results for this particular vote, we can
use the get_result_vote() function:8
## covid_relief_result <- get_result_vote("17689")
head(covid_relief_result[, c("vote_id", "mp_id", "party_id", "vote")])
#> vote_id mp_id party_id vote
#> 1 17689 SSA H mot
#> 2 17689 EAG H ikke_tilstede
#> 3 17689 PTA FrP mot
#> 4 17689 DTA A ikke_tilstede
#> 5 17689 KAAN SV for
#> 6 17689 KAND Sp forFrom looking only at the first six rows of the data, the readers who know the Norwegian political system will suspect that this vote was an opposition versus government vote, but we can also easily get the distribution of votes by party:
table(covid_relief_result$party_id,
covid_relief_result$vote) |>
addmargins()
#>
#> for ikke_tilstede mot Sum
#> A 27 21 0 48
#> FrP 0 12 14 26
#> H 0 22 23 45
#> KrF 0 5 3 8
#> MDG 1 0 0 1
#> R 1 0 0 1
#> Sp 8 12 0 20
#> SV 5 6 0 11
#> Uav 0 0 1 1
#> V 0 5 3 8
#> Sum 42 83 44 169As suspected, the vote was divided between the opposition (A, MDG, R, SP, and SV) and government parties (H, KrF, V, and FrP), and was not adopted by a thin margin of 2 votes. Of course, this is a minimal example, but I will highlight more methods for extracting multiple votes below.
Sequences of data extraction
Below, I show two examples of sequentially extracting data of interest.
Example 1: From periods to interpellations
Most of the mentioned IDs for Stortinget’s data are not only
extractable from the frontend web-page, but also from the back-end API.
These data can be retrieved by various forms of parliamentary period or
session specific functions in stortingscrape. In this
section, I will show how to get all MPs for a specific parliamentary
period and all interpellations for a parliamentary session.
First, however, I note that IDs for periods and sessions are accessed through two core functions in the package:
## parl_periods <- get_parlperiods()
## parl_sessions <- get_parlsessions()
tail(parl_periods[,c("id", "years")])
#> id years
#> 15 1965-69 1965-1969
#> 16 1961-65 1961-1965
#> 17 1958-61 1958-1961
#> 18 1954-57 1954-1958
#> 19 1950-53 1950-1954
#> 20 1945-49 1945-1950
tail(parl_sessions[,c("id", "years")])
#> id years
#> 34 1991-92 1991-1992
#> 35 1990-91 1990-1991
#> 36 1989-90 1989-1990
#> 37 1988-89 1988-1989
#> 38 1987-88 1987-1988
#> 39 1986-87 1986-1987The parliamentary period IDs is mainly used for MP data; Norwegian MPs are elected for 4 year terms, with no constitutional arrangement for snap elections. The MP data also stretch way further back in time than most of the other data in the API:
parl_periods$id[nrow(parl_periods)]
#> [1] "1945-49"
## mps4549 <- get_parlperiod_mps("1945-49")
head(mps4549[, c("mp_id", "county_id", "party_id", "period_id")])
#> mp_id county_id party_id period_id
#> 1 AAKU VA A 1945-49
#> 2 AARY AA A 1945-49
#> 3 ALKJ He H 1945-49
#> 4 ALVÅ Fi NKP 1945-49
#> 5 AMSK ST A 1945-49
#> 6 ANBØ SF V 1945-49From these data, the way is short to extracting more rich data on individual MPs, as will be demonstrated below.
Content data, however, use parliamentary session IDs rather than
period IDs. These functions are standardized to function names as
get_session_*(). For example, we can access all
interpellations from the 2002-2003 session with the
get_session_questions() function:
## interp0203 <- get_session_questions("2002-2003", q_type = "interpellasjoner")
dim(interp0203)
#> [1] 22 26Here, we have 22 interpellations over 26 different variables.
Unfortunately, the API only gives the question and not the answer for
the different types of question requests. Retrieval of question answers
is a daunting task, because it is only accessible through the
unstandardized get_publication() function.
Example 2: From cases to MP vote results
Next, I showcase how to get go from cases in a section, through extracting a case of interest and vote results, to vote matrices for that case.
First, I extract all cases in the 2019-2020 session:
## cases <- get_session_cases("2019-2020")The cases object will here contain all cases treated in
the 2019-2020 parliamentary session. Do note that cases is
a list of 4 elements ($root, $topics,
$proposers, and $spokespersons). In the
following, I use the case ID in $root to access vote
information for a case – in this example the 48th row in the data:9
# The case titles are, unfortunately, not translated
cases$root$title_short[48]
#> [1] "Representantforslag om å reversere avgiftsøkninger på alkoholfrie drikkevarer og bevare arbeidsplasser i norsk næringsmiddelindustri og varehandel"
## vote <- get_vote(cases$root$id[48])
vote[, c("case_id", "vote_id",
"alternative_vote",
"n_for", "n_absent", "n_against")]
#> case_id vote_id alternative_vote n_for n_absent n_against
#> 1 78686 15404 -1 1 82 86
#> 2 78686 15405 15406 46 82 41
#> 3 78686 15406 15405 41 82 46The output gives us a data frame of three votes over 22 variables,
whereof one is the vote ID for each of the votes. We can use this
variable to retrieve rollcall data, using the
get_result_vote function:
## vote_result <- lapply(vote$vote_id, get_result_vote, good_manners = 5)
names(vote_result) <- vote$vote_id
vote_result <- do.call(rbind, vote_result)
head(vote_result[, 3:ncol(vote_result)])
#> vote_id mp_id party_id vote permanent_sub_for sub_for
#> 15404.1 15404 SSA H mot <NA> <NA>
#> 15404.2 15404 EAG H mot <NA> <NA>
#> 15404.3 15404 PTA FrP mot <NA> <NA>
#> 15404.4 15404 DTA A mot <NA> <NA>
#> 15404.5 15404 KAAN SV mot <NA> <NA>
#> 15404.6 15404 MAA Sp ikke_tilstede <NA> <NA>And make an overall proportion table over party distribution for the three votes:
table(vote_result$vote, vote_result$party_id,
dnn = c("Vote result", "Vote ID")) |>
prop.table(margin = 2) |>
round(digits = 2)Summary
In this vignette, I have presented the philosophy, scope, usage, and
workflow of the stortingscrape package for R. In sum,
stortingscrape makes retrieving data from the Norwegian
parliament (Stortinget) more accessible through the back-end
API (data.stortinget.no). One
core philosophy of the package is to let the user tailor the data to
ones needs, while at the same time extracting minimal overlapping data.
The scope of the package ranges from general data on the parliament
itself (rules, session info, committees, etc) to data on the parties,
bibliographies of the MPs, questions, hearings, debates, votes, and
more.
List of functions
A list of all functions and their description can be found in the package documentation within R or from github.