Dokumentteissaan

Dokumentteissaan is a Finnish grammatical form that translates roughly to "in their documents." It is an inflected expression built from the noun dokumentti (document) with the inessive and third-person possessive suffixes, yielding a phrase that refers to material contained in or presented by someone else’s documents. It is not a separate lexical item but a regular inflected form used in formal Finnish.

Usage of dokumentteissaan occurs when attributing information to documents belonging to a party, such as a company or government body, and when specifying that evidence or data comes from those documents. Examples include: "Tutkimuksen tulokset perustuvat dokumentteissaan esitettyyn aineistoon." and "Lainsäätäjä viittaa dokumentteissaan mainittuihin lähteisiin." These sentences illustrate how the form foregrounds the source as belonging to a particular group.

Context and notes: Dokumentteissaan is common in legal, administrative, and journalistic texts, where precise attribution to a group’s own documents is important. In everyday speech, speakers may prefer shorter expressions. The form is typical of Finnish morphology and does not indicate a new concept beyond standard usage of the suffix system.