The phrase "a revealing document of" is correct and usable in written English.
It can be used when describing a document that provides significant insights or information about a particular subject or event.
Example: "The report serves as a revealing document of the company's financial struggles over the past year."
Alternatives: "an enlightening account of" or "a disclosing record of".
I've lost interest in decoding the punk-post-structuralist lyrics; its meaning for me now is as a chillingly revealing document of its time.
Topman believed that all successful investigations developed what he termed an "entry point," in the form of a coöperative witness, a revealing document, or a recorded conversation.
Shortly before he died, Hart did leave behind a self-revealing document, a brief essay addressed to an unspecified "you".
In one revealing document from 2010, GCHQ acknowledged that the US had "raised a number of issues with regards to meeting NSA's minimum expectations".
One of the most revealing documents in the Berenson archives is the draft of a letter that he wrote to his lawyer explaining to the I.R.S. why the appearance of wealth was necessary, and why his books and pictures and travels were legitimate business deductions: They make a difference between personal expenditure & outlay on business.
The documents in question are often referred to as the Downing Street documents, because they include a revealing record of a meeting at No 10 in July 2002.
One of the most revealing documents uncovered by the committee showed an unnamed executive imploring him not to raise the price of Daraprim again, saying that the risk of another media firestorm outweighed the benefit.
The tapes, which church authorities have verified as accurate, are among the more revealing documents in the continuing scandal of sexual abuse by clerics and subsequent cover-ups by the church.
It could apply as effectively to a single abuse-revealing document.
A revealing example of backward thinking.
