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DL Data Dictionary (MMF2)
Record Format
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See also:  DL Descriptive Metadata  |   Structural Metadata (Holdings)

These Guidelines are to be used in formatting metadata records using the "Digital Library Data Dictionary."


Guidelines

1) Begin each data element in a record on a new line (CR/LF at end)

2) Use the ASCII Latin-1 character set; use ISO entities for special characters as needed. (See sample guidelines.)  Do not use HTML or other markup language elements in DLDD records.

3) The structure for each line of data is: DLDD tag, space, vertical bar, space, tag occurrence number, space -- followed by data content, e.g.,

e.g.,   dd001 | 1 | [data content]

4) For some DLDD data elements, a second-level occurrence number is required, e.g.,

presentationAddress | 2 | 1 | cdd.p41.b.1-0.600.jpg

This is followed by another vertical bar and a space.  

NB: The reasons for the primary and secondary occurrence numbers are several and include: a) uniquely identifying elements that may have the same DLDD tag for purposes of database loading and management; b) linking together elements that are dependent on one another for intelligibility; and c) providing--in some cases--a fixed order for purposes of presentation / display when this could not readily be derived from the content.

5) Indicate the beginning of a discrete DLDD metadata record by preceding the first element of the record with a line containing only "###". E.g.,

[Last line of previous record}
###
[First line of next record]

This convention should be present even if there is only a single record in a file.

6) When transmitting one or more files of DLDD formatted records, use file names in the following format:

institution_idenfier.project_name.file_number.date_of_creation.txt

e.g.,

CtY.apis.6.20000501.txt
(Yale, APIS project, file #6, May 1, 2000 text file)

When feasible, use the MARC Code List for Organizations for the insitution identifier and ISO 8601 for the date element.

 


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Last revision: 09/06/13
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