Project Start -- Code Tables -- Metadata

National Digital Library Program
Digital Repository Development and Support
NDLP Repository Source Item Data Table

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NU_SOURCE   NUMBER(9) Source Work ID
CD_DESCRIPTION   VARCHAR2(2), Descriptive Information Type
NU_DESCRIPTION   NUMBER(15), Descriptive Information ID
CD_CONTENT   VARCHAR2(4), Content Type
CD_SOURCE_GEN   VARCHAR2(3), Version used to digitize
CD_CONVERSION   VARCHAR2(2), Text Conversion
CD_FORMAT   VARCHAR2(3), Physical Format
CD_CONDITION   VARCHAR2(2), Physical Condition
CD_SOURCE_EXTENT   VARCHAR2(3), Source Extent Type
TX_SOURCE_EXTENT   NUMBER(12), Source Extent Value
CD_SOURCE_SIDES   VARCHAR2(2), Sides digitized
CD_EXHIBIT   VARCHAR2(4) Exhibit digitized for
NU_EXHIBIT   VARCHAR2(20) Exhibit Item ID

Color Mode:  Indicates whether source item used in digitizing an intellectual work is in color or shades of gray.  This attribute is also referred to as "chromatic value." Currently recognized color modes are listed below:

Color ModeMeaningCode
BitonalBlack and white only; no shades of gray.01
ColorColor tones; no shades of gray.02
GrayscaleShades of gray; no color tones.03

Content Type:  Indicates the general physical nature of the source item used to digitize an intellectual work. Content Type does not indicate the genre or subject content of the source item nor does it indicate how the source item was digitized (e.g., scanned, encoded). Content types include:

Descriptive Information ID:  Indicates value used to identify the machine-readable bibliographic information that describes the source item.

Descriptive Information Type:  Indicates the type of machine-readable bibliographic information that describes the source item.  Examples:  MARC record, MINARET record, Electronic Archival Description (EAD), MUMS record.

Exhibit digitized for:  Identifies the LC exhibition that caused the source item to be digitized.

Exhibit Item ID:  Identifies a source item within the LC exhibition that caused it to be digitized.

Inventory ID:  The persistent identifer of the physical item used to digitize an intellectual work. 

Physical Format:  Indicates the physical format of the source item used to digitize an intellectual work.  The default for this field is "Hard copy/Bound hard cover."

Physical FormatCode
Hard Copy/Bound hard cover001
Hard Copy/Bound soft cover002
Hard Copy/unbound multiple sheets003
Hard Copy/unbound single sheet004

Physical Condition:  Indicates the physical condition of an LC collection item as determined by custodial personnel. The condition recorded for a given item may change over time, but only one condition can be associated with that item at a time.  The default is "Good as of last handling."

Physical Condition Meaning Code
Not yet assessed Determination of an item's physical condition has not yet been made by the custodial division. 01
Good as of last handling Condition of item was good as of the last time it was handled by the custodial division. 02
Binding needs repair Binding of item needs either to be repaired or replaced. 03
Brittle Pages of bound item are in extremely brittle condition.  Candidate for either deacidification or preservation microfilming. 04
Send to Preservation Office Physical condition of item requires evaluation by the Preservation Office. 05
Pages missing Pages are missing but usefulness of item is not impaired. 06
Pages torn Pages of item are torn or otherwise damaged. 07
Replacement pages needed Missing pages must be replaced in order to restore full usefulness of item. 08
Stained Cover or pages of item are stained or have suffered water damage. 09

Sides Digitized:  Indicates which sides of the source item were or are to be digitized.

Sides DigitizedCode
Front and Back03
Top and Bottom06
Front, Back, Top, and Bottom07

Source Extent Information:  Indicates the range over which a source item reaches as expressed in space or time.   Source extent types include dimensions in centimeters, inches, and pixels as well as duration, such as the playing time of an audio recording or motion picture.   Source extent Information is a combination attribute with two subordinate attributes, source extent type and source extent value.

Source Extent Type:  Part of the combination Source Extent Information.  Indicates whether the extent is a range of space or time and the nature of how it is expressed.  Source extent types currently defined are listed below.

Source Extent Value:  Part of the combination attribute Source Extent Information.  Provides measurement values used to indicate the dimensions or playing time of an item.  Source Extent Value will vary according to the Source Extent Type specified.  Value formats for currently defined Source Extent Types are indicated below.

Source Extent
Name Unit of
Value Format
001 Duration time HHHH:MM:SS.SSS

(H = hours, M = minutes,
and S = seconds)

002 Dimensions (pixel) pixels WWWW:HHHH

(W = width and H = height)

003 Dimensions inches WWWW:HHHH

(W = width and H = height)

004 Dimensions (metric) cm WWWW:HHHH

(W = width and H = height)

Source Work ID:  Idenfities an intellectual work that is being or has been digitized as part of an aggregate.  The Source Work ID is usually a "one-up" count number.  It is unique only within the first aggregate to which the associated intellectual work was assigned.

Version Used to Digitize:  Indicates whether the original source item or an interim surrogate such as a color transparency was used to digitize and intellectual work.

CodeShort NameLong Name
001OriginalOriginal Source Item
002Analog Tape Interim Surrogate - Analog Tape - Audio
003Copy Negative Interim Surrogate - Copy Negative
004Digital Tape Interim Surrogate - Digital Tape - Audio
005Photocopy Interim Surrogate - Photocopy
006 TransparencyInterim Surrogate - Color Transparency
007Video TapeInterim Surrogate - Video Tape

Text Conversion:  Indicates the encodinging scheme (if any) used to convert source item text for online display.

Text Encoding Scheme
CodeShort NameText Encoding Scheme
00N/ANot Applicable
01No IDEncoding scheme not yet identified
02HTMLHyperText Markup Language
03SGMLStandard Generalized Markup Language
04XMLExtended Markup Language

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Created: 7/21/98       Revised: 6/14/99
National Digital Library Program - Digital Repository Development Project