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Representation level

Table of contents

  1. /representation_1 (directory)
  2. METS.xml (file)
    1. Elements and internal references
    2. <mets> section
    3. <metsHdr> section
    4. <structMap> section
  3. /data (directory)
  4. /metadata (directory)
    1. /descriptive (directory)
    2. /preservation (directory)

The representation level consists of at least one representation directory (in the remainder of this text we will use representation_1 as an example). Each representation directory contains information about the representation of (one of) the IE(s) of the package level, together with the media files making up the representation.

Example

root_directory
│   ...
│
└──representations
   │
   └──representation_1
   │  │── METS.xml
   │  │
   │  └──data
   │  │  │   ...
   │  │
   │  └──metadata
   │     │
   │     └──descriptive
   │     │  │   ...
   │     │
   │     └──preservation
   │        │   ...
   │
   │
   │
   └──representation_*
      │   ...

/representation_1 (directory)

A representation directory consists of at least a METS.xml file, a /data directory and a /metadata directory. It contains both descriptive and preservation metadata, as well as the actual media files making up a certain representation of the IE(s) of the SIP.

Each representation directory contains its own METS.xml file which acts similarly as the package METS.xml and serves as an inventory of the files and directories of the representation level.

A representation directory may contain a /documentation and a /schemas directory. The former may contain additional information aiding the interpretation of the representation, while the latter may contain XML Schema Definition (XSD) files of the metadata schemas used in the representation. These two directories are ignored during ingest and will therefore not be archived.

Requirements

#MSIP202 A representation directory MUST contain exactly one METS.xml file. The word METS in the filename MUST be written in all caps as displayed here.
#MSIP203 The top level representation directory MUST have the value of the OBJID attribute in the METS.xml header as directory name. See mets/@OBJID for more details.
#MSIP204 A representation directory MUST contain exactly one /metadata directory.
#MSIP205 A representation directory MUST contain exactly one /data directory.
#MSIP206 A representation directory MAY contain exactly one /documentation directory.
#MSIP207 A representation directory MAY contain exactly one /schemas directory.

METS.xml (file)

The METS.xml file at the representation level (also known as the representation mets) generally follows the same structure and requirements as the package mets discussed in the section package METS.xml.

Elements and internal references

Since the dmdSec, amdSec, fileSec sections follow the same requirements (where possible) as the package METS.xml file, each dedicated subsection below only lists (additional) requirements regarding the mets, metsHdr and structMap elements.

Some of these elements, or their child elements, are identified with an identifier, contained in the @ID attribute (see the requirements in the sections below). These identifiers must be unique within the SIP.

The <structMap> serves as the entrypoint for locating the metadata, data or manifest files during parsing of the SIP. Therefore, it contains pointers to the @ID identifiers defined in the <fileSec>, <dmdSec>, and <amdSec> sections. An overview of the different elements and references on the representation level is given in the following figure.

Internal references between elements in the METS.xml
Internal references between elements in the representation METS.xml.

In addition, the <fileGrp> and <file> elements can also reference contents of the <amdSec> and <dmdSec>, however this is optional. A summary of all possible references and their obligation is given in the table below.

Pointer Obligation Target
mets/structMap[@LABEL='CSIP']/div/div[@LABEL='Representations']/fptr/@FILEID MUST mets/fileSec/fileGrp/@ID or mets/fileSec/fileGrp/file/@ID if allowed by the profile.
mets/structMap[@LABEL='CSIP']/div/div[@LABEL='Metadata']/@DMDID MUST mets/dmdSec/@ID
mets/structMap[@LABEL='CSIP']/div/div[@LABEL='Metadata']/@ADMID MUST mets/amdSec/digiprovMD/@ID
mets/fileSec/fileGrp/@ADMID MAY mets/amdSec/digiprovMD/@ID
mets/fileSec/fileGrp/file/@DMDID MAY mets/dmdSec/@ID
mets/fileSec/fileGrp/file/@ADMID MAY mets/amdSec/digiprovMD/@ID

<mets> section

Example

<?xml version="1.0"?>
<mets xmlns="http://www.loc.gov/METS/"
      xmlns:csip="https://DILCIS.eu/XML/METS/CSIPExtensionMETS"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns:xlink="http://www.w3.org/1999/xlink"
      OBJID="representation_1"
      TYPE="Photographs – Digital"
      PROFILE="https://earksip.dilcis.eu/profile/E-ARK-SIP-v2-2-0.xml" xsi:schemaLocation="https://www.w3.org./1999/xlink http://www.loc.gov/standards/xlink/xlink.xsd  http://www.loc.gov/METS/ https://www.loc.gov/standards/mets/mets.xsd https://DILCIS.eu/XML/METS/CSIPExtensionMETS https://earkcsip.dilcis.eu/schema/DILCISExtensionMETS.xsd ">

<metsHdr>...</metsHdr>
<dmdSec>...</dmdSec>
<amdSec>...</amdSec>
<fileSec>...</fileSec>
<structMap>...</structMap>

</mets>

Requirements

#MSIP208
Element		 /mets:mets/
Name METS root element
Description This is the root element of the representation METS.It MUST contain the following XML schema namespaces:mets: http://www.loc.gov/METS/csip: https://DILCIS.eu/XML/METS/CSIPExtensionMETSxsi: http://www.w3.org/2001/XMLSchema-instancexlink: http://www.w3.org/1999/xlink
Datatype  
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP209
Attribute		 /mets:mets/@OBJID
Name Representation identifier
Description This is an identifier for the representation METS document. Its value MUST be the same as the name of the top level representation folder (e.g., "representation_1" for the example above).
Datatype ID
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP210
Attribute		 /mets:mets/@TYPE
Name Content category
Description This attribute MUST be set to declare the category of the content held in the representation directory.
Datatype String; fixed vocabulary
Vocabulary Textual works – PrintTextual works – DigitalTextual works – Electronic SerialsDigital Musical Composition (score-based representations)Musical Scores - PrintMusical Scores - DigitalPhotographs – PrintPhotographs – DigitalOther Graphic Images – PrintOther Graphic Images – DigitalMicroformsAudio – On Tangible Medium (digital or analog)Audio – Media-independent (digital)Motion Pictures – Digital and Physical MediaVideo – File-based and Physical MediaSoftwareSoftware and Video GamesEmailDatasetsGeospatial DataGeographic Information System (GIS) - Vector DataGIS Raster and Georeferenced ImagesGIS Vector and Raster CombinedNon-GIS Cartographic2D and 3D Computer Aided DesignDesign (schematics, architectural drawings) - PrintScanned 3D Objects (output from photogrammetry scanning)DatabasesWebsitesWeb ArchivesCollectionEventImageInteractive resourceMoving imageSoundStill imageTextPhysical objectServiceMixedOther
Cardinality 1..1
Obligation MUST
#MSIP211
Attribute		 /mets:mets[@TYPE="OTHER"]/@csip:OTHERTYPE
Name Other content category
Description When the mets/@TYPE attribute is set to OTHER, the mets/@csip:OTHERTYPE attribute SHOULD be used to declare the content category of the representation not contained in the fixed vocabulary of the @TYPE attribute.
Datatype String
Vocabulary  
Cardinality 0..1
Obligation SHOULD
#MSIP212
Attribute		 /mets:mets/@PROFILE
Name METS profile
Description The URL of the E-ARK METS profile that the SIP conforms with.This URL MUST be set to https://earksip.dilcis.eu/profile/E-ARK-SIP.xml to indicate conformance with the E-ARK specification.
Datatype URL
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP213
Attribute		 /mets:mets/@LABEL
Name Package name
Description An optional short text describing the contents of the representation.
Datatype String
Vocabulary  
Cardinality 0..1
Obligation MAY

<metsHdr> section

Example

<metsHdr CREATEDATE="2022-02-16T10:02:37.009+02:00" csip:OAISPACKAGETYPE="SIP"/>

Requirements

#MSIP214
Element		 /mets:mets/mets:metsHdr
Name Representation header
Description General element that contains descriptive information about the representation.
Datatype  
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP215
Attribute		 /mets:mets/mets:metsHdr/@CREATEDATE
Name Representation creation datetime
Description This attribute records the date and time the representation was created.
Datatype XML Schema datetime
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP216
Attribute		 /mets:mets/mets:metsHdr/@LASTMODDATE
Name Representation last modification datetime
Description In case the representation was modified since its creation, this attribute records the date and time of that modification.This attribute MUST be present and used when the representation has been modified since its creation datetime.
Datatype XML Schema datetime
Vocabulary  
Cardinality 0..1
Obligation SHOULD
#MSIP217
Attribute		 /mets:mets/mets:metsHdr/@csip:OAISPACKAGETYPE
Name OAIS Package type information
Description The value of @csip:OAISPACKAGETYPE MUST be set to SIP to indicate to meemoo that the delivered content is a SIP meant for ingest.
Datatype String
Vocabulary SIP
Cardinality 1..1
Obligation MUST
#MSIP218
Attribute		 /mets:mets/mets:metsHdr/@RECORDSTATUS
Name Representation status
Description A way of indicating the status of the representation and to instruct meemoo on how to properly handle it.If not set, the expected value is NEW.Meemoo investigates the use of the @RECORDSTATUS attribute for future use cases such as e.g. a metadata update (i.e. ingest of metadata only with the goal of updating, adding or deleting existing metadata in meemoo’s archive system).
Datatype String; fixed vocabulary
Vocabulary NEWSUPPLEMENTREPLACEMENTTESTVERSIONDELETEOTHER
Cardinality 0..1
Obligation MAY
#MSIP219
Element		 /mets:mets/mets:metsHdr/mets:agent
Name Agent
Description  
Datatype  
Vocabulary  
Cardinality 0..*
Obligation MAY
#MSIP220
Attribute		 /mets:mets/mets:metsHdr/mets:agent/@ROLE
Name Agent role
Description  
Datatype String
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP221
Attribute		 /mets:mets/mets:metsHdr/mets:agent/@TYPE
Name Agent type
Description  
Datatype String
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP222
Attribute		 /mets:mets/mets:metsHdr/mets:agent/@OTHERTYPE
Name Agent other type
Description This attribute MUST be used if the attribute agent/@TYPE is set to OTHER. It is used to specify the exact other type that is being used.
Datatype String
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP223
Element		 /mets:mets/mets:metsHdr/mets:agent/name
Name Agent name
Description  
Datatype String
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP224
Element		 /mets:mets/mets:metsHdr/mets:agent/note
Name Agent additional information
Description  
Datatype String
Vocabulary  
Cardinality 0..1
Obligation MAY

<structMap> section

The structMap element outlines the hierarchical structure of the representation level of the SIP. Its requirements are very similar to the package level, however, instead of pointing to the contained representations, a data division points to the contained files.

Example

<structMap ID="uuid-f81f8688-b278-4397-b59c-82593b11a2b9" TYPE="PHYSICAL" LABEL="CSIP">
    <div ID="uuid-a5e05d29-49d9-4466-b070-19b8990b5029" LABEL="representation_1">
        <div ID="uuid-af54ed63-8361-4d90-a30f-99d02de24857" LABEL="Metadata" 
            ADMID="uuid-f7972ff5-599e-4f60-8b7e-8bbf4e035482" />
        <div ID="uuid-c137b167-7254-4085-b965-75980976638d" LABEL="data">
            <fptr FILEID="uuid-d020d7d1-f258-40af-8788-04cf62a0032b" />
        </div>
    </div>
</structMap>
#MSIP225
Attribute		 /mets:mets/structMap[@LABEL='CSIP']/div/div[@LABEL='data']
Name Content division
Description The data referenced in the file section file groups are described in the structural map within a single sub-division called data.
Datatype  
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP226
Attribute		 /mets:mets/structMap[@LABEL='CSIP']/div/div[@LABEL='data']/@ID
Name Content division identifier
Description A unique identifier to the data division. This can be used for internal package references.
Datatype ID
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP227
Attribute		 /mets:mets/structMap[@LABEL='CSIP']/div/div[@LABEL='data']
Name Content division label
Description The representations div element’s @LABEL attribute value MUST be data.
Datatype String
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP228
Element		 /mets:mets/structMap[@LABEL='CSIP']/div/div[@LABEL='data']/fptr
Name Content division file references
Description All file groups containing content described in the package are referenced via the relevant file group identifiers.There MUST be one file group reference per fptr element.
Datatype  
Vocabulary  
Cardinality 1..*
Obligation MUST
#MSIP229
Attribute		 /mets:mets/structMap[@LABEL='CSIP']/div/div[@LABEL='data']/fptr/@FILEID
Name Content division file group references
Description The pointer to the identifier for the data file group.This identifier MUST correspond to an identifier of a file/@ID attribute in the fileSec section of the METS file.
Datatype ID
Vocabulary  
Cardinality 1..1
Obligation MUST

/data (directory)

The /data directory contains the media files of a specific representation of the SIP. Depending on the use-case and the CP, these files can be digital pictures, video, audio…

Requirements

#MSIP231 The /data directory MUST NOT contain any subdirectories.
#MSIP232 All files in the /data directory MUST be referenced in the corresponding representation METS.xml file.

/metadata (directory)

The /metadata directory contains both descriptive and preservation metadata about the representation and the media files at the representation level.

Requirements

#MSIP233 The /metadata directory MUST contain the subdirectory /preservation and it MAY contain the /descriptive subdirectory.

/descriptive (directory)

The /descriptive directory contains descriptive metadata about the representation. This descriptive metadata is stored in XML files, describing the specific representation of the SIP.

Descriptive metadata at the represenation level follows the same requirements regarding metadata elements discussed in the /descriptive section of the package level. Hence, the concrete requirements of descriptive metadata files and the applied metadata schemas are defined by the content profiles.

/preservation (directory)

The /preservation directory contains preservation metadata about the representation and the media files.

Requirements

#MSIP234 The /preservation directory MUST contain exactly one file: premis.xml.

The premis.xml file of the representation level contains preservation metadata about the representation and the media files of the representation level. It relies on the PREMIS standard in order to provide basic preservation information such as checksums. More detailed preservation information can be described using PREMIS events and PREMIS agents.

Example

<?xml version="1.0" encoding="UTF-8"?>
<premis:premis version="3.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:premis="http://www.loc.gov/premis/v3" xsi:schemaLocation="http://www.loc.gov/premis/v3 https://www.loc.gov/standards/premis/premis.xsd">

  <premis:object xsi:type="premis:representation">

    <premis:objectIdentifier>
      <premis:objectIdentifierType>UUID</premis:objectIdentifierType>
      <premis:objectIdentifierValue>uuid-541292c3-223a-4b80-b747-66bc86ff4a89</premis:objectIdentifierValue>
    </premis:objectIdentifier>

    <!-- relationship between representation and its files -->
    <premis:relationship>
      <premis:relationshipType authority="relationshipType" authorityURI="http://id.loc.gov/vocabulary/preservation/relationshipType" valueURI="http://id.loc.gov/vocabulary/preservation/relationshipType/str">structural</premis:relationshipType>
      <premis:relationshipSubType authority="relationshipSubType" authorityURI="http://id.loc.gov/vocabulary/preservation/relationshipSubType" valueURI="http://id.loc.gov/vocabulary/preservation/relationshipSubType/inc">includes</premis:relationshipSubType>
      <premis:relatedObjectIdentifier>
        <premis:relatedObjectIdentifierType>UUID</premis:relatedObjectIdentifierType>
        <premis:relatedObjectIdentifierValue>uuid-bd610fa4-077c-40cc-a278-74220df0a0c1</premis:relatedObjectIdentifierValue>
      </premis:relatedObjectIdentifier>
      <premis:relatedObjectIdentifier>
        <premis:relatedObjectIdentifierType>UUID</premis:relatedObjectIdentifierType>
        <premis:relatedObjectIdentifierValue>uuid-950ea040-5e79-4223-b804-b76660ec7e85</premis:relatedObjectIdentifierValue>
      </premis:relatedObjectIdentifier>
    </premis:relationship>

    <!-- relationship between representation and its IE -->
    <premis:relationship>
      <premis:relationshipType authority="relationshipType" authorityURI="http://id.loc.gov/vocabulary/preservation/relationshipType" valueURI="http://id.loc.gov/vocabulary/preservation/relationshipType/str">structural</premis:relationshipType>
      <premis:relationshipSubType authority="relationshipSubType" authorityURI="http://id.loc.gov/vocabulary/preservation/relationshipSubType" valueURI="http://id.loc.gov/vocabulary/preservation/relationshipSubType/rep">represents</premis:relationshipSubType>
      <premis:relatedObjectIdentifier>
        <premis:relatedObjectIdentifierType>UUID</premis:relatedObjectIdentifierType>
        <premis:relatedObjectIdentifierValue>uuid-948e2213-ca54-459c-8c87-5818adeb9444</premis:relatedObjectIdentifierValue>
      </premis:relatedObjectIdentifier>
    </premis:relationship>
  </premis:object>

  <premis:object xsi:type="premis:file">

    <premis:objectIdentifier>
      <premis:objectIdentifierType>UUID</premis:objectIdentifierType>
      <premis:objectIdentifierValue>uuid-bd610fa4-077c-40cc-a278-74220df0a0c1</premis:objectIdentifierValue>
    </premis:objectIdentifier>

    <premis:objectCharacteristics>
      <premis:fixity>
        <premis:messageDigestAlgorithm authority="cryptographicHashFunctions" authorityURI="http://id.loc.gov/vocabulary/preservation/cryptographicHashFunctions" valueURI="http://id.loc.gov/vocabulary/preservation/cryptographicHashFunctions/md5">
                MD5
        </premis:messageDigestAlgorithm>
        <premis:messageDigest>b7ae37f6094794e313402b9d064978e8</premis:messageDigest>
      </premis:fixity>
      <premis:size>721603</premis:size>
      <premis:format>
        <premis:formatRegistry>
          <premis:formatRegistryName>PRONOM</premis:formatRegistryName>
          <premis:formatRegistryKey>fmt/1507</premis:formatRegistryKey>
          <premis:formatRegistryRole authority="formatRegistryRole" authorityURI="http://id.loc.gov/vocabulary/preservation/formatRegistryRole" valueURI="http://id.loc.gov/vocabulary/preservation/formatRegistryRole/spe">specification</premis:formatRegistryRole>
        </premis:formatRegistry>
      </premis:format>
    </premis:objectCharacteristics>

    <premis:originalName>1445.jpeg</premis:originalName>

    <!-- relationship between file and its representation -->
    <premis:relationship>
      <premis:relationshipType authority="relationshipType" authorityURI="http://id.loc.gov/vocabulary/preservation/relationshipType" valueURI="http://id.loc.gov/vocabulary/preservation/relationshipType/str">structural</premis:relationshipType>
      <premis:relationshipSubType authority="relationshipSubType" authorityURI="http://id.loc.gov/vocabulary/preservation/relationshipSubType" valueURI="http://id.loc.gov/vocabulary/preservation/relationshipSubType/isi">is included in</premis:relationshipSubType>
      <premis:relatedObjectIdentifier>
        <premis:relatedObjectIdentifierType>UUID</premis:relatedObjectIdentifierType>
        <premis:relatedObjectIdentifierValue>uuid-541292c3-223a-4b80-b747-66bc86ff4a89</premis:relatedObjectIdentifierValue>
      </premis:relatedObjectIdentifier>
    </premis:relationship>

  </premis:object>

  <premis:object xsi:type="premis:file">

    <premis:objectIdentifier>
      <premis:objectIdentifierType>UUID</premis:objectIdentifierType>
      <premis:objectIdentifierValue>uuid-950ea040-5e79-4223-b804-b76660ec7e85</premis:objectIdentifierValue>
    </premis:objectIdentifier>

    <premis:objectCharacteristics>
      <premis:fixity>
        <premis:messageDigestAlgorithm authority="cryptographicHashFunctions" authorityURI="http://id.loc.gov/vocabulary/preservation/cryptographicHashFunctions" valueURI="http://id.loc.gov/vocabulary/preservation/cryptographicHashFunctions/md5">
                MD5
        </premis:messageDigestAlgorithm>
        <premis:messageDigest>d4985ba4b67ff067a0e84c53b6d35355</premis:messageDigest>
      </premis:fixity>
      <premis:size>738611</premis:size>
      <premis:format>
        <premis:formatRegistry>
          <premis:formatRegistryName>PRONOM</premis:formatRegistryName>
          <premis:formatRegistryKey>fmt/1507</premis:formatRegistryKey>
          <premis:formatRegistryRole authority="formatRegistryRole" authorityURI="http://id.loc.gov/vocabulary/preservation/formatRegistryRole" valueURI="http://id.loc.gov/vocabulary/preservation/formatRegistryRole/spe">specification</premis:formatRegistryRole>
        </premis:formatRegistry>
      </premis:format>
    </premis:objectCharacteristics>

    <premis:originalName>1450.jpeg</premis:originalName>

    <!-- relationship between file and its representation -->
    <premis:relationship>
      <premis:relationshipType authority="relationshipType" authorityURI="http://id.loc.gov/vocabulary/preservation/relationshipType" valueURI="http://id.loc.gov/vocabulary/preservation/relationshipType/str">structural</premis:relationshipType>
      <premis:relationshipSubType authority="relationshipSubType" authorityURI="http://id.loc.gov/vocabulary/preservation/relationshipSubType" valueURI="http://id.loc.gov/vocabulary/preservation/relationshipSubType/isi">is included in</premis:relationshipSubType>
      <premis:relatedObjectIdentifier>
        <premis:relatedObjectIdentifierType>UUID</premis:relatedObjectIdentifierType>
        <premis:relatedObjectIdentifierValue>uuid-541292c3-223a-4b80-b747-66bc86ff4a89</premis:relatedObjectIdentifierValue>
      </premis:relatedObjectIdentifier>
    </premis:relationship>

  </premis:object>

</premis:premis>

Overview of relevant PREMIS relationships

On the representation level, the preservation metadata is used to express

  • what the representations and files are that are contained in the SIP; and
  • how they relate to eachother or to IEs described on the package level.

The table below gives an overview of the different relationship types that can be used on the representation level:

Direction Relationship type Relationship subtype Reciprocal/inverse relationship Description
From Representation to IE structural represents is represented by A representation represents a specific IE
From Representation to File structural includes is included in A representation includes one or more file objects
From File to Representation structural is included in includes A file is included in a representation

Requirements

#MSIP230
Element		 /premis:premis
Name PREMIS root element
Description This is the root element of the PREMIS file.It MUST contain the following XML schema namespaces: xsi: http://www.w3.org/2001/XMLSchema-instancepremis: http://www.loc.gov/premis/v3.
Datatype  
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP235
Attribute		 /premis:premis/@version
Name PREMIS version attribute
Description This attribute signals which PREMIS version is being used.The attribute’s value MUST be set to 3.0.
Datatype  
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP236
Attribute		 /premis:premis/@xsi:schemaLocation
Name Schema location declaration
Description This attribute signals where to find the relevant XSD schema in order to validate the PREMIS file.When used, its value MUST be set to "http://www.loc.gov/premis/v3 https://www.loc.gov/standards/premis/premis.xsd" to signal conformance with PREMIS 3.0.
Datatype  
Vocabulary  
Cardinality 0..1
Obligation SHOULD
#MSIP237
Element		 /premis:premis/premis:object
Name PREMIS object
Description A premis:object element MUST be defined for each representation and file of the representation level in the SIP.
Datatype  
Vocabulary  
Cardinality 1..*
Obligation MUST
#MSIP238
Attribute		 /premis:premis/premis:object/@xsi:type
Name Object type
Description This attribute signals whether a PREMIS object is of type intellectual entity, representation or file.In the case of the premis.xml file of the representation level, this attribute’s value MUST be set to premis:representation in the case of a representation object, and to premis:file in the case of a file object.
Datatype  
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP239
Element		 /premis:premis/premis:object/premis:objectIdentifier
Name Object identifier
Description This element contains object identifier information.There MUST be exactly one object identifier present with premis:objectIdentifierType set to UUID. This is the main identifier for the concerned representation or file, which uniquely identifies the concerned IE and establishes a link between the relevant preservation metadata in the premis.xml file and the descriptive metadata in the dc*.xml file, if any is present. There MAY be zero or more additional object identifiers of a different type.
Datatype  
Vocabulary  
Cardinality 1..*
Obligation MUST
#MSIP240
Element		 /premis:premis/premis:object/premis:objectIdentifier/premis:objectIdentifierType
Name Object identifier type
Description The type of the PREMIS object identifier being used.At least one identifier of type UUID MUST be defined in order to provide a unique identifier for each PREMIS object.This unique identifier is also used to link the concerned PREMIS object with the descriptive metadata in the /metadata/descriptive/dc*.xml file, if any is present.
Datatype String; fixed vocabulary (e.g. PREMIS standard identifiers)
Vocabulary UUIDMEEMOO-LOCAL-IDand all keys from this list.
Cardinality 1..1
Obligation MUST
#MSIP241
Element		 /premis:premis/premis:object/premis:objectIdentifier/premis:objectIdentifierValue
Name Object identifier value
Description The actual value that makes up the identifier of the PREMIS object.
Datatype String (depending on the value of the premis:objectIdentifierType)
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP242
Element		 /premis:premis/premis:object/premis:relationship
Name PREMIS relationship
Description Information about a relationship between the current object and one or more other objects. In the case of the premis.xml file of the representation level, this element MUST detail the relationships between the representation and IE on the one hand, and between the representation and file(s) on the other hand.
Datatype  
Vocabulary  
Cardinality 1..*
Obligation MUST
#MSIP243
Element		 /premis:premis/premis:object/premis:relationship/premis:relationshipType
Name Relationship type
Description A high-level categorization of the nature of the relationship.In the case of the premis.xml file of the representation level, this element’s value MUST be set to structural.
Datatype String
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP244
Attribute		 /premis:premis/premis:object/premis:relationship/premis:relationshipType/@authority
Name Relationship type authority attribute
Description This attribute indicates the name of the authority/controlled vocabulary that is being used for the different relationship types. Its value MUST be set to "relationshipType".
Datatype String
Vocabulary  
Cardinality 0..1
Obligation MAY
#MSIP245
Attribute		 /premis:premis/premis:object/premis:relationship/premis:relationshipType/@authorityURI
Name Relationship type authority URI
Description This attribute references the URI that contains the authority/controlled vocabulary. Its value MUST be set to "http://id.loc.gov/vocabulary/preservation/relationshipType".
Datatype URI
Vocabulary  
Cardinality 0..1
Obligation MAY
#MSIP246
Attribute		 /premis:premis/premis:object/premis:relationship/premis:relationshipType/@valueURI
Name Relationship type value URI
Description This attribute references the URI that contains the specific entry from the authority/controlled vocabulary.For the structural relationship type, this attribute’s value MUST be set to "http://id.loc.gov/vocabulary/preservation/relationshipType/str".
Datatype URI
Vocabulary  
Cardinality 0..1
Obligation MAY
#MSIP247
Element		 /premis:premis/premis:object/premis:relationship/premis:relationshipSubType
Name Relationship subtype
Description A detailed categorization of the nature of the relationship.In the case of the premis.xml file of the representation level, this element’s value MUST be set to represents when expressing the relationship between a representation and the IE it represents.When expressing the relationship between a representation and a file, this element’s value MUST be set to includes when this relationship is expressed from the side of the representation (i.e. the representation is the subject of the relationship); when this relationship is expressed from the side of the file (i.e. the file is the subject of the relationship), this element’s value MUST be set to is included in.
Datatype String; fixed vocabulary
Vocabulary representsincludesis included in
Cardinality 1..1
Obligation MUST
#MSIP248
Attribute		 /premis:premis/premis:object/premis:relationship/premis:relationshipSubType/@authority
Name Relationship subtype authority attribute
Description This attribute indicates the name of the authority/controlled vocabulary that is being used for the different relationship subtypes. Its value MUST be set to "relationshipSubType".
Datatype String
Vocabulary  
Cardinality 0..1
Obligation MAY
#MSIP249
Attribute		 /premis:premis/premis:object/premis:relationship/premis:relationshipSubType/@authorityURI
Name Relationship subtype authority URI
Description This attribute references the URI that contains the authority/controlled vocabulary. Its value MUST be set to "http://id.loc.gov/vocabulary/preservation/relationshipSubType".
Datatype URI
Vocabulary  
Cardinality 0..1
Obligation MAY
#MSIP250
Attribute		 /premis:premis/premis:object/premis:relationship/premis:relationshipSubType/@valueURI
Name Relationship subtype value URI
Description This attribute references the URI that contains the specific entry from the authority/controlled vocabulary.If the represents relationship subtype is being used, this attribute’s value MUST be set to "http://id.loc.gov/vocabulary/preservation/relationshipSubType/rep".If the includes relationship subtype is being used, this attribute’s value MUST be set to "http://id.loc.gov/vocabulary/preservation/relationshipSubType/inc".If the is included in relationship subtype is being used, this attribute’s value MUST be set to "http://id.loc.gov/vocabulary/preservation/relationshipSubType/isi"
Datatype URI; fixed vocabulary
Vocabulary "http://id.loc.gov/vocabulary/preservation/relationshipSubType/rep""http://id.loc.gov/vocabulary/preservation/relationshipSubType/inc""http://id.loc.gov/vocabulary/preservation/relationshipSubType/isi"
Cardinality 0..1
Obligation MAY
#MSIP251
Element		 /premis:premis/premis:object/premis:relationship/premis:relatedObjectIdentifier
Name Related object identifier
Description This element references the object of the relationship that is expressed.
Datatype  
Vocabulary  
Cardinality 1..*
Obligation MUST
#MSIP252
Element		 /premis:premis/premis:object/premis:relationship/premis:relatedObjectIdentifier/premis:relatedObjectIdentifierType
Name Related object identifier type
Description The type of the PREMIS related object identifier being used.
Datatype String; fixed vocabulary (e.g. PREMIS standard identifiers)
Vocabulary IDUUID…
Cardinality 1..1
Obligation MUST
#MSIP253
Element		 /premis:premis/premis:object/premis:relationship/premis:relatedObjectIdentifier/premis:relatedObjectIdentifierValue
Name Related object identifier value
Description The actual value that makes up the identifier of the PREMIS related object.
Datatype String (depending on the value of the premis:relatedObjectIdentifierType)
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP254
Element		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics
Name Object characteristics
Description If the PREMIS object is of type file, this element MUST be used to further specify the various characteristics of the file object such as fixity, size and format information.
Datatype  
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP255
Element		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:fixity
Name Fixity
Description This element contains the fixity information of the PREMIS file object. It encapsulates the message digest algorithm that is being used and its value.
Datatype  
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP256
Element		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:fixity/premis:messageDigestAlgorithm
Name Message digest algorithm
Description This element details which algorithm is used to construct the message digest for the digital file object present.
Datatype String; fixed vocabulary
Vocabulary MD5
Cardinality 1..1
Obligation MUST
#MSIP257
Attribute		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:fixity/premis:messageDigestAlgorithm/@authority
Name Message digest algorithm authority attribute
Description This attribute indicates the name of the authority/controlled vocabulary that is being used for the different message digest algorithms. Its value MUST be set to "cryptographicHashFunctions".
Datatype String
Vocabulary  
Cardinality 0..1
Obligation MAY
#MSIP258
Attribute		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:fixity/premis:messageDigestAlgorithm/@authorityURI
Name Message digest algorithm authority URI
Description This attribute references the URI that contains the authority/controlled vocabulary. Its value MUST be set to "http://id.loc.gov/vocabulary/preservation/cryptographicHashFunctions".
Datatype URI
Vocabulary  
Cardinality 0..1
Obligation MAY
#MSIP259
Attribute		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:fixity/premis:messageDigestAlgorithm/@valueURI
Name Message digest algorithm value URI
Description This attribute references the URI that contains the specific entry from the authority/controlled vocabulary.
Datatype URI
Vocabulary http://id.loc.gov/vocabulary/preservation/cryptographicHashFunctions/md5
Cardinality 0..1
Obligation MAY
#MSIP260
Element		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:fixity/premis:messageDigest
Name Message digest
Description This element contains the actual value calculated message digest algorithm specified in the premis:messageDigestAlgorithm element.
Datatype String
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP261
Element		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:size
Name File size
Description The size of the file object. This MUST be expressed in bytes.
Datatype Integer
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP262
Element		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:format
Name File format identification
Description This element contains information about the format of the file object. At least one of premis:formatDesignation or premis:formatRegistry MUST be present.
Datatype  
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP263
Element		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:format/premis:formatDesignation
Name File format designation
Description This element contains an identification of the format of the file object.
Datatype  
Vocabulary  
Cardinality 0..1
Obligation SHOULD
#MSIP264
Element		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:format/premis:formatDesignation/premis:formatName
Name File format name
Description A commonly accepted name for the file format.
Datatype String; fixed vocabulary (from a format or technical registry, e.g. PRONOM)
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP265
Element		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:format/premis:formatDesignation/premis:formatVersion
Name File format version
Description The version of the format named in premis:formatName.
Datatype  
Vocabulary  
Cardinality 0..1
Obligation MAY
#MSIP266
Element		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:format/premis:formatRegistry
Name Format registry
Description This element identifies and/or gives further information about the file format by referencing an entry in a format registry (e.g. PRONOM).
Datatype  
Vocabulary  
Cardinality 0..1
Obligation SHOULD
#MSIP267
Element		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:format/premis:formatRegistry/premis:formatRegistryName
Name Format registry name
Description Name of the referenced format registry
Datatype String
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP268
Element		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:format/premis:formatRegistry/premis:formatRegistryKey
Name Format registry key
Description Unique key that is used by the format registry for the concerned file format.
Datatype ID
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP269
Element		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:format/premis:formatRegistry/premis:formatRegistryRole
Name Format registry role
Description The purpose or expected use of the format registry. This MUST be set to specification.
Datatype  
Vocabulary  
Cardinality 1..1
Obligation MUST
#MSIP270
Element		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:format/premis:formatRegistry/premis:formatRegistryRole/@authority
Name Format registry role authority
Description This attribute indicates the name of the authority/controlled vocabulary that is being used. Its value MUST be set to "http://id.loc.gov/vocabulary/preservation/formatRegistryRole".
Datatype URI
Vocabulary  
Cardinality 0..1
Obligation MAY
#MSIP271
Element		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:format/premis:formatRegistry/premis:formatRegistryRole/@valueURI
Name Format registry role value URI
Description This attribute references the URI that contains the specific entry from the authority/controlled vocabulary.This attribute’s value MUST be set to "http://id.loc.gov/vocabulary/preservation/formatRegistryRole/spe".
Datatype URI
Vocabulary  
Cardinality 0..1
Obligation MAY
#MSIP272
Element		 /premis:premis/premis:object[@xsi:type="premis:file"]/premis:originalName
Name Original filename
Description This element contains the original name of the file object, including its extension.
Datatype String
Vocabulary  
Cardinality 1..1
Obligation MUST

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