Structural Metadata Dictionary for LC Digital Objects

Structural Metadata List
Version 1.04b

The digital object and data element information listed below provide structural metadata support for non-motion visual material (e.g., photographs, images of text document pages), SGML encoded documents, sound recordings, and motion visual material (e.g., video tape, motion pictures). Such pieces of information, which represents inherent characteristics of digital objects and data elements, are referred to as "attributes."


Digital Object Metadata

Attribute Field Name Required Repeatable
HandleHandle
Yes
No
DescriptionDescription
Yes
Yes
Original Content Type Orig_content_type
Yes
No
Rights and PermissionsRights_and_permissions
Yes
Yes
Owner of Digital ObjectDO_Owner
Yes
No
Number of Data ElementsNum_data_elements
Yes
No
Number of Instances Num_instances

No

No

Parent Object Information Parent_object_info
Not yet fully defined
No
Yes
Deposit Information Deposit_info

    Date_deposited

    Time_deposited

Yes
No
Digital Object UseDO_use
Yes
No
Special FunctionDO_special_function
No
No
Last Revision Last_revision

    Date_last_revision

    Time_last_revision

Yes
No
Data ElementSee table below
Yes
Yes



Data Element Metadata for Digital Object

Data Element Attribute Field Name Required Repeatable
Data Size Data_size
Yes
No
Data Size Unit Data_size_unit
Yes
No
Data Type Data_type
Yes
No
Data Element Description DE_description
Yes
Yes
Data Element Rights and Permissions DE_rights_and_permissions
No
Yes
Instance Instance

No

No

Data Element Deposit Information DE_deposit_info

    Date_deposited

    Time_deposited

Yes
No
Data Element Relationship Information DE_relationship_info

    DE_relationship_type

    DE_relationship_value

No

Yes

Data Element UseDE_use
Yes
No
Last Data Element Revision Last_DE_revision

    Date_DE_last_revised

    Time_DE_last_revised

Yes
No
Creation Information Creation_info

    Date_created

    Equipment_used

    Creator


No

No

Page Information* * for Data_types GIF, JPG, SID, & TIF only Page_info

    Page_type

    Page_value

No
Yes
Associated File* * for Data_types RA & SGML only Assoc_file

    Assoc_file_type

    Assoc_file_name

No
Yes
Extent*   (dimensions; duration)

* for all Data_types except
  SGML, XML, HTTP, & TXT

Extent_info

    Extent_type

    Extent_value

Yes
No
Orientation*

* for Data_types GIF, TIF & JPG only

Image_Orient
Yes
No
Resolution*

* for Data_types GIF, TIF, JPG,
  AVI, MPEG & QuickTime only

Resolution
Yes
No
Bit Depth*

* for Data_types GIF, TIF, JPG,
  AVI, MPEG & QuickTime only

Bit_Depth
Yes
No
Color Mode*

* for Data_types GIF, TIF, JPG,
  AVI, MPEG & QuickTime only

Color_Mode
Yes
No
Data Element ContentData
Yes
No


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Created: 5/29/97      Revised: 8/4/98
National Digital Library Program - Digital Repository Development Project
Comments: vvit@loc.gov