Difference between revisions of "Structure"

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#REDIRECT [[:Category:API]]
This is a definition of some terms used in the eprints documentation and comments. Many of these are "objects" within the code and the perl module which handle them is listed.
; '''archive''' :  
An archive is a eprints archive with it's own website configuration and data. One install of the eprints software can run serveral seperate archives. Sharing code but with totally different configurations.
; '''session''' :
A session is created every time a cgi script or a bin script is executed, and terminated afterwards.
; '''eprint''' :
An eprint is a record in the system which has one or more ''documents'' and some ''metadata''. Usually, more than one ''document'' is to provide the same information in multiple formats, although this is not compulsary.
; '''document''' :
A document is a single format of an ''eprint'', eg. HTML, PDF, PS etc. It can contain more than one file, for example HTML may contain more than one html page + image files. The actual files are stored in the filesystem.
; '''user''' :
A user registered with the system. (NOT necesarily the author of the ''eprints'' they deposit).
; '''subject''' :
A ''subject'' has an id and a list of who it's parents are. There is a build in ''subject'' with the id "ROOT" to act as the top level. A subject can have more than one parent to allow you to create a rich lattice, rather than just a tree, but loops are not allowed.
; '''type''' or '''usertype''' or '''eprinttype''' : ''users'', ''eprints'' and ''documents'' all have a "type". This controls how they are "cited" and also for ''users'' and ''eprints'' it controls what ''fields'' may be edited, and which are required.
; '''dataobj''' or '''item''' :
The "super class" of ''subjects'', ''users'', ''eprints'' and ''documents''. In the very core of the system these are all treated identically and much of the configuration and methods of these classes of "thing" are identical. We use the term ''item'' to speak about the general case.
; '''dataset''' :
A dataset is a collection of ''items'' of the same type. It can be searched.
Some datasets all have the same "config id". The "config id" is used to get information about the dataset from the archive config - inbox, buffer, archive and deletion all have the same metadata fields and types.
Core datasets are:
              |              |
  inbox      | eprint      | Eprints which users are still working on.
  buffer    | eprint      | Eprints submitted for editorial approval.
  archive    | eprint      | Eprints live in the archive.
  deletion  | eprint      | Eprints which have been deleted from the archive.
  user      | user        | Users registered.
  subject    | subject      | The subject tree or lattice.
  document  | document    | The documents belonging to ALL
              |              | eprints in the system.
subscription | subscription | The subscriptions which users have requested.
; '''database''' :
The connection to the MySQL back end. ''datasets'' are stored in the MySQL system, but you do not have to address it directly.
; '''fields''' or '''metadata fields''' :
A single field in a dataset. Each dataset has a few "system" fields which eprints uses to manage the system and then any number of ''archive'' specific fields which you may configure.
; '''subscriptions''' (sometimes called alerts in other archives) :
A stored search which is performed every day/week/month and any new results are the mailed to the user who owns the subscription.
This diagram does not show "Subscription". Subscription is a subclass of DataObj (like EPrint, User etc.). A Subscription is associated with one User. A User is associated with 0..n Subscription's.

Latest revision as of 12:17, 12 August 2009

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