This is the 12112th most frequent Swedish word.
riksmötets
"Riksmötets" means "of the National Assembly" or "of the Parliament session" in English.
Here, 'riksmötets' is the genitive form of 'riksmöte,' indicating possession, namely the opening 'of the parliamentary session'.
Riksmötets öppnande skedde igår.
The opening of the parliamentary session occurred yesterday.
In this case, 'riksmötets' represents possession of the 'decisions,' showing what entity they belong to.
Vi diskuterade riksmötets beslut.
We discussed the decisions of the parliamentary session.
Here, 'riksmötets' modifies 'talmannen,' specifying the speaker associated with the parliamentary session.