Link to entity. Edit list of linked entities and their local metadata.

Provides CARBON directory links in the public CARBON data.

<h1><tt>/argon/iodine/container</tt>: Storage Container</h1>

Offers the user the ability to create an entity, given a template.

Provides CARBON directory links to contained entities.

<h1><tt>/argon/iodine/document</tt>: Editable document</h1>

This interface is for editing document entities, whose primary
function is to publish some static data, for example CHROME source
code or general CARBON reference data.

The document entity doesn't directly publish the data in its CARBON
metadata, but provides personas whose CARBON metadata is each a
version of what is published. The document entity itself provides
links to the latest release and other useful information. In essence,
a document entity provides a version control system suitable for
maintaining a published artefact:

* Commits/Versions/Diffs

* Branches and merges

* Pull requests

* Code review process for pull requests

* Tagging a release (only "release" versions are listed on the "front
page")

* Ticket tracking, and linking tickets to commits

* The ability to clone a document entity, and then to push pull
requests back to the origin

* Managing the "project metadata" also exposed from the document
  entity; this covers the functions of project home page and project
  wiki for internal documentation that shouldn't be versioned along
  with the source (THAT stuff can actually live in with the
  source). This itself is a "document" in its own right, so is
  modelled as a chain of versions inside the document entity itself -
  but with a separate root commit, similar to how github pages
  work. The project metadata doesn't have releases and code reviews,
  though.

Each actual version (release or not) gets a persona that exposes that
data via CARBON, plus a small metadata statement marking it as a
version of something, with a link to the document entity itself and to
all parent/child versions, and metadata declaring it as a release or
not.

A special persona reflects the "latest version" of each branch, by
issuing a redirection to the actual persona for that version, too.

<h1><tt>/argon/iodine/entity</tt>: Entity Administration</h1>

Edit ACLs, delete entity, directly edit TUNGSTEN state.

This one might deserve some special-casing somewhere in
LITHIUM/WOLFRAM/TUNGSTEN in order to allow designated cluster
super-users to let people back into entities they've locked themselves
out of...

<h1><tt>/argon/iodine/physical</tt>: Physical object</h1>

Location information, and images (from pictures to 3D models) of its
physical manifestation.