CDL Microservices and Ruby

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Chris Beer's Microservices Ruby wrappers

  • pairtree Now there's an official CDL pairtree implementation in ruby called orchard
  • noid Identifier minting
  • anvl A Name-Value Language "Basically like email headers"
  • dflat Filesystem Convention for managing digital objects (maybe versioning too)
  • checkm Manifest format ... Filename/checksum/createdate
  • lockit File locking that is safe for Network filesystems
  • namaste Name as Text -- file names on filesystems tell you something about what the directory contains
  • microservices A Rails3 app that tries to put all of these pieces together (work in progress)
  • bagit Bagit manifest format (from Library of Congress)

Use Case(s)

Given that I have some image files
And the files already have names
Then I should be able to put the files somewhere
And I should be able to collect user-contributed metadata
And I should be able to track checksums for files
And I should be able to access content at persistent URLs


  • graphical metadata editing and generation of filesystem
  • fixity service
  • inventory and solr ingestion

fork of cbeer's microservices demonstrator: [1]