The inventory is expected to provide more information on the volume and scope of classified documents, including details on the level of classification, according to the two people familiar with the matter, who spoke on the condition of anonymity to discuss a sensitive topic. There are records at the very highest levels of classification, including some that can be viewed by only a small number of government officials, the two people said.

“There are records that only a very few have clearances” to review, one of the people told The Post. The documents are so sensitive that they may not be able to describe them in an unclassified way, and, therefore, such documents might be described broadly in a classified addendum to the inventory, according to the two people.