Versions Compared

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.
Comment: Migrated to Confluence 4.0

...

  • Bitstreams and Bundles are second-class archival objects; they are recorded in the context of an Item.
  • BitstreamFormats are not even second-class; they are described implicitly within Item technical metadata, and reconstructed from that during restoration
  • EPeople are only defined in Site AIP, but may be referenced from Community or Collection AIPs
  • Groups may be defined in Site AIP, Community AIP or Collection AIP. Where they are defined depends on whether the Group relates specifically to a single Community or Collection, or is just a general site-wide group.

What is NOT in AIPs

  • Wiki MarkupDSpace Site configurations (\[dspace\]/config/ directory) or customizations (themes, stylesheets, etc) are not described in AIPs
  • DSpace Database model (or customizations therein) is not described in AIPs
  • Any objects which are not currently in the "In Archive" state are not described in AIPs. This means that in-progress, unfinished submissions are never included in AIPs.

...

  • mets element
    • @PROFILE fixed value="http://www.dspace.org/schema/aip/1.0/mets.xsd" (this is how we identify an AIP manifest)
    • @OBJID URN-format persistent identifier (i.e. Handle) if available, or else a unique identifier. (e.g. "hdl:123456789/1")
    • @LABEL title if available
    • @TYPE DSpace object type, one of "DSpace ITEM", "DSpace COLLECTION", "DSpace COMMUNITY" or "DSpace SITE".
    • @ID is a globally unique identifier, built using the Handle and the Object type (e.g. dspace-COLLECTION-hdl:123456789/3).
  • mets/metsHdr element
    • @LASTMODDATE last-modified date for a DSpace Item, or nothing for other objects.
    • agent element:
      • @ROLE = "CUSTODIAN",
      • @TYPE = "OTHER",
      • @OTHERTYPE = "DSpace Archive",
      • Wiki Markup{{name}} = _Site handle_. (Note: The Site Handle is of the format {{\[handle_prefix\]/0}}, e.g. "123456789/0")
    • agent element:
      • @ROLE = "CREATOR",
      • @TYPE = "OTHER",
      • @OTHERTYPE = "DSpace Software",
      • Wiki Markup{{name}} = "DSpace \ [version\]" (Where "\[version\]" is the specific version of DSpace software which created this AIP, e.g. "1.7.0")
  • mets/dmdSec element(s)
    • By default, two dmdSec elements are included for all AIPs:
      1. object's descriptive metadata crosswalked to MODS (specified by mets/dmdSec/mdWrap@MDTYPE="MODS"). See #MODS Schema section below for more information.
      2. object's descriptive metadata in DSpace native DIM intermediate format, to serve as a complete and precise record for restoration or ingestion into another DSpace. Specified by mets/dmdSec/mdWrap@MDTYPE="OTHER",@OTHERMDTYPE="DIM". See #DIM (DSpace Intermediate Metadata) Schema section below for more information.
    • For Collection AIPs, additional dmdSec elements may exist which describe the Item Template for that Collection. Since an Item template is not an actual Item (i.e. it only includes metadata), it is stored within the Collection AIP. The Item Template's dmdSec elements will be referenced by a div @TYPE="DSpace ITEM Template" in the METS structMap.
    • When the mdWrap @TYPE value is OTHER, the element MUST include a value for the @OTHERTYPE attribute which names the crosswalk that produced (or interprets) that metadata, e.g. DIM.
  • mets/amdSec element(s)
    • One or more amdSec elements are include for all AIPs. The first amdSec element contains administrative metadata (technical, source, rights, and provenance) for the entire archival object. Additional amdSec elements may exist to describe parts of the archival object (e.g. Bitstreams or Bundles in an Item).
      • techMD elements. By default, two types of techMD elements may be included:
        • PREMIS metadata about an object may be included here (currently only specified for Bitstreams (files)). Specified by mdWrap@MDTYPE="PREMIS". See #PREMIS Schema section below for more information.
        • DSPACE-ROLES metadata may appear here to describe the Groups or EPeople related to this object (_currently only specified for Site, Community and Collection). Specified by mdWrap@MDTYPE="OTHER",@OTHERMDTYPE="DSPACE-ROLES". See #DSPACE-ROLES Schema section below for more information.
      • rightsMD elements. By default, there are four possible types of rightsMD elements which may be included:
        • METSRights metadata may appear here to describe the permissions on this object. Specified by mdWrap@MDTYPE="OTHER",@OTHERMDTYPE="METSRIGHTS". See #METSRights Schema section below for more information.
        • DSpaceDepositLicense if the object is an Item and it has a deposit license, it is contained here. Specified by mdWrap@MDTYPE="OTHER",@OTHERMDTYPE="DSpaceDepositLicense".
        • CreativeCommonsRDF If the object is an Item with a Creative Commons license expressed in RDF, it is included here. Specified by mdWrap@MDTYPE="OTHER",@OTHERMDTYPE="CreativeCommonsRDF".
        • CreativeCommonsText If the object is an Item with a Creative Commons license in plain text, it is included here. Specified by mdWrap@MDTYPE="OTHER",@OTHERMDTYPE="CreativeCommonsText".
      • sourceMD element. By default, there is only one type of sourceMD element which may appear:
        • AIP-TECHMD metadata may appear here. This stores basic technical/source metadata about in object in a DSpace native format. Specified by mdWrap@MDTYPE="OTHER",@OTHERMDTYPE="AIP-TECHMD". See #AIP Technical Metadata Schema (AIP-TECHMD) section below for more information.
      • digiprovMD element.
        • Not used at this time.
  • mets/fileSec element
    • For ITEM objects:
      • Each distinct Bundle in an Item goes into a fileGrp. The fileGrp has a @USE attribute which corresponds to the Bundle name.
      • Bitstreams in bundles become file elements under fileGrp.
      • mets/fileSec/fileGrp/file elements
        • Set @SIZE to length of the bitstream. There is a redundant value in the <techMD> but it is more accessible here.
        • Set @MIMETYPE, @CHECKSUM, @CHECKSUMTYPE to corresponding bitstream values. There is redundant info in the <techMD>. (For DSpace, the @CHECKSUMTYPE="MD5" at all times)
        • SET @SEQ to bitstream's SequenceID if it has one.
        • SET @ADMID to the list of <amdSec> element(s) which describe this bitstream.
    • For COLLECTION and COMMUNITY objects:
      • Only if the object has a logo bitstream, there is a fileSec with one fileGrp child of @USE="LOGO".
      • The fileGrp contains one file element, representing the logo Bitstream. It has the same @MIMETYPE, @CHECKSUM, @CHECKSUMTYPE attributes as the Item content bitstreams, but does NOT include metadata section references (e.g. @ADMID) or a @SEQ attribute.
      • See the main structMap for the fptr reference to this logo file.
  • mets/structMap - Primary structure map, @LABEL="DSpace Object", @TYPE="LOGICAL"
    • For ITEM objects:
      1. Top-Level div with @TYPE="DSpace Object Contents".
        • For every Bitstream in Item it contains a div with @TYPE="DSpace BITSTREAM". Each Bitstream div has a single fptr element which references the bitstream location.
      • If Item has primary bitstream, put it in structMap/div/fptr (i.e. directly under the div with @TYPE="DSpace Object Contents")
    • For COLLECTION objects:
      1. Top-Level div with @TYPE="DSpace Object Contents".
        • For every Item in the Collection, it contains a div with @TYPE="DSpace ITEM". Each Item div has up to two child mptr elements:
          1. One linking to the Handle of that Item. Its @LOCTYPE="HANDLE", and @xlink:href value is the raw Handle.
          2. (Optional) one linking to the location of the local AIP for that Item (if known). Its @LOCTYPE="URL", and @xlink:href value is a relative link to the AIP file on the local filesystem.
      • If Collection has a Logo bitstream, there is an fptr reference to it in the very first div.
      • If the Collection includes an Item Template, there will be a div with @TYPE="DSpace ITEM Template" within the very first div. This div @TYPE="DSpace ITEM Template" must have a @DMDID specified, which links to the dmdSec element(s) that contain the metadata for the Item Template.
    • For COMMUNITY objects:
      1. Top-Level div with @TYPE="DSpace Object Contents".
        • For every Sub-Community in the Community it contains a div with @TYPE="DSpace COMMUNITY". Each Community div has up to two mptr elements:
          1. One linking to the Handle of that Community. Its @LOCTYPE="HANDLE", and @xlink:href value is the raw Handle.
          2. (Optional) one linking to the location of the local AIP file for that Community (if known). Its @LOCTYPE="URL", and @xlink:href value is a relative link to the AIP file on the local filesystem.
        • For every Collection in the Community there is a div with @TYPE="DSpace COLLECTION". Each Collection div has up to two mptr elements:
          1. One linking to the Handle of that Collection. Its @LOCTYPE="HANDLE", and @xlink:href value is the raw Handle.
          2. (Optional) one linking to the location of the local AIP file for that Collection (if known). Its @LOCTYPE="URL", and @xlink:href value is a relative link to the AIP file on the local filesystem.
      • If Community has a Logo bitstream, there is an fptr reference to it in the very first div.
    • For SITE objects:
      1. Top-Level div with @TYPE="DSpace Object Contents".
        • For every Top-level Community in Site, it contains a div with @TYPE="DSpace COMMUNITY". Each Item div has up to two child mptr elements:
          1. One linking to the Handle of that Community. Its @LOCTYPE="HANDLE", and @xlink:href value is the raw Handle.
          2. (Optional) one linking to the location of the local AIP for that Community (if known). Its @LOCTYPE="URL", and @xlink:href value is a relative link to the AIP file on the local filesystem.
  • mets/structMap - Structure Map to indicate object's Parent, @LABEL="Parent", @TYPE="LOGICAL"
    • Contains one div element which has the unique attribute value TYPE="AIP Parent Link" to identify it as the older of the parent pointer.
      • It contains a mptr element whose xlink:href attribute value is the raw Handle of the parent object, e.g. 1721.1/4321.

...

For the Site Object, the following fields are translated to the DIM schema:

Metadata Field

Value

<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="7ab82280-8e41-4528-9dfc-09c87c86b943"><ac:plain-text-body><![CDATA[

dc.identifier.uri

Handle of Site (format: [handle_prefix]/0)

]]></ac:plain-text-body></ac:structured-macro>

dc.title

Name of Site (from dspace.cfg 'dspace.name' config)

MODS Schema

Wiki MarkupBy default, all DSpace descriptive metadata (DIM) is also translated into the [MODS Schema|http://www.loc.gov/standards/mods/] by utilizing DSpace's {{MODSDisseminationCrosswalk}}. DSpace's DIM to MODS crosswalk is defined within your {{\[dspace\]/config/crosswalks/mods.properties}} configuration file. This file allows you to customize the MODS that is included within your AIPs.

For more information on the MODS Schema, see http://www.loc.gov/standards/mods/mods-schemas.html

...

AIP Technical Metadata for Site

Metadata Field

Value

<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="f2c8c85e-1220-4e4c-bdf0-d578e448847d"><ac:plain-text-body><![CDATA[

dc.identifier.uri

Site Handle (format: [handle_prefix]/0)

]]></ac:plain-text-body></ac:structured-macro>

PREMIS Schema

At this point in time, the PREMIS Schema is only used to represent technical metadata about DSpace Bitstreams (i.e. Files). The PREMIS metadata is generated by DSpace's PREMISCrosswalk. Only the PREMIS Object Entity Schema is used.

...

In 1.8.2 and above, the Group is renamed using the following format: "ORPHANED\_\[object-type\]\_GROUP\_\[obj-id\]\_\[group-type\]" (e.g. "ORPHANED_COLLECTION_GROUP_10_ADMIN").
  • Prior to 1.8.2, the Group was renamed with a random key: "GROUP\_\[random-hex-key\]\_\[object-type\]\_\[group-type\]" (e.g. "GROUP_123eb3a_COLLECTION_ADMIN"). _This old format was discontinued as giving the groups a randomly generated name caused the SITE AIP to have a different checksum every time it was regenerated (see [DS-1120|https://jira.duraspace.org/browse/DS-1120])._

    The reasoning is that we were unable to translate an Internal ID into an External ID (i.e. Handle). If we are unable to do that translation, re-importing or restoring a group with an old internal ID could cause conflicts or instability in your DSpace system. In order to avoid such conflicts, these groups are renamed using a random, unique key.

    Warning
    titleOrphaned Groups are Renamed on Export

    If a Group name includes a Community or Collection Internal ID (e.g. "COLLECTION_45_SUBMIT"), and that Community or Collection no longer exists, then the Group is considered "Orphaned".

    Wiki Markup
    Wiki Markup

    ...