The phrase "a document asserting" is correct and usable in written English.
It can be used when referring to a written text that makes a claim or declaration about a particular subject.
Example: "The report is a document asserting the need for immediate action on climate change."
Alternatives: "a paper claiming" or "a text stating".
Some analysts have privately circulated a document asserting that the vocational school is being used as camouflage for government operations.
The post was erected in late March by Buddhist residents of the village in Myanmar's lush Irrawaddy delta region who signed, or were strong-armed into signing, a document asserting that they wanted to live separately.
In 1992, Dick Cheney, the defense secretary for Bush 41, and his aides, Paul Wolfowitz and Scooter Libby, drafted a document asserting that America should prepare to cast off formal alliances and throw its military weight around to prevent the rise of any "potential future global competitor" and to preclude the spread of nuclear weapons.
Cooper pointed out that Deer had signed a document asserting that he had no financial interest.
How can a so-called Founding Father author a document asserting independence for "all" yet allow institutionalized slavery to persist in society and on his property where he lives?
To those who claimed the third category, the church presents a bland document asserting that you walked the road — thanks for participating, everyone's a winner.
The Vatican was forced to cancel an Oct. 3 symposium on dialogue between Christians and Jews after two Italian rabbis dropped out to protest a Vatican document asserting the primacy of the Roman Catholic Church.
The pro-creationist Discovery Institute issued a policy document asserting: Ever since Darwin's day, people have been concerned that his theory undercuts morality in the traditional sense and they are right (Pearcey 2000).
But there's also the problem of the Romney side's barely concealed scorn for anyone who doesn't get that sometimes you just have to sign an S.E.C. document asserting one thing or the other; that's how it works.
There are various statements in the Tusk document asserting the rights of outs must be protected, including the right not to pay costs of a euro member states' bailout, but the mechanism for protecting the rights of the euro-outs is left unclear.
The document asserts that artificial contraception introduces a "false note" into a marriage and has led to a decline in respect for life in society.
