materials should be completed with two archival principles that fall within respect des fonds in mind: provenance and original order. According to the principle of provenance, an originator's materials should be maintained together and separated from those of other originators. Under the rules of provenance, maintenance of the materials must include making them searchable and retrievable together (known as their intellectual arrangement) and could include keeping them physically together, if it is practical to do so. Additionally, if the materials have changed hands beyond the originator, the provenance of an item includes all those who came after the creator and any changes they make to the collection such as insertions, deletions, rearranging. According to the principle of original order, the originator's arrangement of the materials holds value, because it reflects how they originally used and accessed the collection, as well as how the records relate to each other, which can both inform the initial purpose of the records. Depending on the collection, rearrangement of the materials may not be required if a logical original order appears to have been maintained, the arrangement provides contextual clues about the purpose of the records and the arrangement does not interfere with researcher access to the materials. If rearrangement is required, archival processors will arrange the materials at the collection level, series level, subseries level, box level, folder level, or item level. The level of arrangement is determined by a number of factors, which include but are not limited to the orderliness of the material, the probable researcher interest and research value in the collection,[2] and the policy and resources of the repository. If arrangement tasks are required, arrangement is the first phase of physically processing the materials after the survey. In addition to rearranging the materials, there may also be weeding of material that does not meet a repository's collecting guidelines, as well as the preservation activities described below. Description Levels of description More detailed descriptions than that which results from a collection survey of the material are generally attempted. Beyond the survey, the individual processing the collection may create a listing of the "series" and "sub-series", listing of box contents (also called box-level description), folder lists (folder-level description), or even complete inventories that include administrative histories or biographical notes, scope notes, acquisition information, and information as to the archival processing treatment the material has received. Some repositories will conduct item-level description of