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In the digital collections, the letter takes the form of a work: https://digital.sciencehistory.org/admin/works/wm117p03j

To place the work in its archival contextthe context of the collection’s archival arrangement, the D.C. gives you the following clues:

• The letter is part of a collection, the Beckman Collection.

  • 💡 A work can be part of more than one collection, but a collection cannot be part of another collection.

• The letter is part of a subseries and a series within the Beckman collection.

  • This information is stored as an unordered sequence of two strings:

  • Series Arrangement

    • Series I. Arnold O. Beckman Files

    • Sub-series 1. Correspondence

  • Notes re: series arrangement:

    • Each string concatenates the type of metadata ( Sub-series), the identifier, (I.), and the title of the grouping: (Arnold O. Beckman Files)

    • There’s no ordering information to encode the fact that a series is more important than a subseries.

    • There’s no way to order the subseries within a given series

    • There’s no way to order the series within a collection.

• The letter also has an ASpace Reference Number: 118f36c4c5a373e4b4a81253ebc85fae.

  • This ASpace Reference number can tie a work or collection in the D.C. to any level of archival arrangement in ArchivesSpace as long as that level is an “archival object”

  • Practically speaking, this means works or collections in the D.C. can be associated with “file”s, subseries, or series in ArchivesSpace.

• The letter’s physical location within the collection is also denoted by metadata, in the form of a Work::PhysicalContainer. This is just a set of seven keys (box; folder; page; part; volume; shelfmark; and reel).

  • For this letter, all the keys except box and folder are blank.

  • “Box” has as its value the string “1”

  • “Folder” has as its value the string “29”.

ArchivesSpace:

In ArchivesSpace, the work letter takes the form of a “digital object”:

https://sciencehistory.libraryhost.com/admin/digital_objects/247#tree::digital_object_247

• The digital object “digital object” contains as part of its metadata the URL to the “work” in the digital collections.

• The “digital object” is not an “archival object”.

• It also contains a link to what ArchivesSpace calls a “file”:

  • The “file”'s URL is https://sciencehistory.libraryhost.com/admin/resources/1#tree::archival_object_10615 .

  • The “file” is a digital surrogate for a manila folder (folder 29 in box 1) which contains the letter.

  • A “file” is an “archival object” (as opposed to a “digital object”).

  • The “file”’s title is “Los Angeles Chamber of Commerce - Air Pollution Committee, 1951-1954”

  • The “file” has a unique ID which is 118f36c4c5a373e4b4a81253ebc85fae.

  • The “file” is also part of a subseries.

• The subseries the “file” is part of is called “Sub-series 1. Correspondence”.

  • Like the file it contains, the subseries is an “archival object”.

  • https://sciencehistory.libraryhost.com/admin/resources/1#tree::archival_object_5

  • The subseries has a unique ID, Ref ID 66a590971707f99df33fc42be0d0c909

• The subseries is part of a series.

  • The series is called Series I. Arnold O. Beckman Files, 1918-2009, undated

  • The series is also an “archival object”

  • Its URL is https://sciencehistory.libraryhost.com/admin/resources/1#tree::archival_object_1

• The series is part of a collection, of course.

  • Beckman Historical Collection

  • https://sciencehistory.libraryhost.com/admin/resources/1#tree::resource_1

  • The collection is not an “archival object”, but a “resource”.

  • It does not have a hexadecimal Ref ID, but