AMICO Data Specification: Image & Multimedia

B. Related Image and Multimedia Files Specification
Version 1.2

Note: The AMICO Data Specification is comprised of:

A. Text Record Specification
B. Related Image and Multimedia File Specification (this page)
C. AMICO Data Dictionary

1. "Main Image" Contributed to AMICO
• Each work of art contributed to The AMICO Library must be documented by at least one image, showing a full view of the work.
1.1 Resolution
• Images contributed to AMICO should generally have a minimum resolution of 1024 x 768 pixels. Members are encouraged to contribute larger files, to allow for user manipulation such as zooming.
• Existing images at resolutions below 1024 x 768 (such as those at 800 x 600 created for a CD-ROM project) may be accepted with the understanding that they may have to be replaced in subsequent years. Those museums who intend to submit at a lower resolution, are requested to post notification to the AMICO Technical Operations Committee Discussion.
1.2 Bit Depth
• All images must be at least 24 bit color.
1.3 File Format/Compression
• Images should be submitted to The AMICO Library as uncompressed files in the TIFF format. This will enable future compression by a distributor without loss of quality. Certain research uses also require uncompressed images.
• AMICO members may produce their own compressed files to the specifications of any particular distributor. These files would be provided in addition to the uncompressed TIFF and on a schedule defined with the distributor.
• Distributors will be asked to declare their image sampling/compression processes, for AMICO review and approval. AMICO members will also be given an opportunity to review the results of distributor's compression routines, through the Technical Committee.
1.4 File Names
• All associated media files, text, image, multimedia, etc., will follow the same naming and linking conventions.
• Filenames are entered in the appropriate linking field in the AMICO main catalog record: Related-Image-Identifier/link RIL, Related-Document-Identifier/Link RDL or Related-Multimedia-Identifier/link RML
• As there are many differing schemes in use in AMICO member institutions, file names are not assumed to have any meaning. The characteristics of images are recorded in their accompanying metadata records.
• AMICO filenames are comprised of three parts:
• Institutional abbreviation [4 letter prefix - as with AMICO-Identifier]
  . identifying string of characters
  .file format suffix [3 character MIME type extension, e.g. .tif; .jpg, .cgm, .mov]
  
• File names must not include the following characters:

  *	asterix	\	back-slash
  "	quotations marks (open or close)	é	any accented characters
  `	backtick	:	colon
  ?	question mark	#	hash or number sign
  '	apostrophe	< or >	angle brackets
  /	slash	( or )	parens
  &	ampersand	[ or ]	square brackets
  %	percent sign	{ or }	curly brackets
  			or "spaces"

• Filenames can be in any combination of upper and lower case letters and numerals, and are case sensitive.
• T case of the value in the catalog record linking field (Related Image Link) must match the file name exactly for a file to link.
1.5 References in Catalog Records
• Each image file contributed must be referenced, exactly, in the Related Image Link (RIL) field in the AMICO catalog record. The exact file name (matching upper and lower case) must be entered in the catalog record to make a link between records and associated files. The Related Image Preferred (RIP) indicator, Related Image Relationship (RIR) and Related Image Description (RID) are also required.
2. Metadata For Related Image, Media and Document Files
• Each image or other media file will be accompanied by a separate structured text metadata record, containing the minimum fields, as specified.
• Sample metadata records are posted on the AMICO Web site, along with sample image and media files.
• Delimiters and character set specifications are identical for metadata records and for the AMICO main catalog record.
3. Related Multimedia Files
• Associated media files should be contributed to The AMICO Library in their native format. i.e. in QuickTime, WAV, RealAudio, etc. and named with the registered MIME extension.
• Files must be accompanied by a metadata record, and referenced by an entry in the Related-Multimedia group field of an AMICO Catalogue Record.
• Each multimedia file contributed must be referenced, exactly, in the Related Multimedia Link (RML) field in the AMICO catalog record. The exact file name (matching upper and lower case) must be entered in the catalog record to make a link between records and associated files. The Related Multimedia Relationship (RMR) and Related Multimedia Description (RMD) are also required.
4. Related Documents
• Related textual documents can be contributed in any common format:
• Page images can be in TIFF, GIF or JFIF file format
• Text documents can be in ASCII, or Rich Text Format (RTF)
• Documents may also be in Portable Document Format (PDF)
• Marked up texts can be in Hypertext Mark-up Language (HTML), eXtended Markup Language (XML) or Standard Generalized Markup Language (SGML)
• Each related document file must be accompanied by a metadata record, and referenced by an entry in the Related-Documents Group (RDG) field of an AMICO Catalog record.
• Each related document file contributed must be referenced, exactly, in the Related Document Link (RDL) field in the AMICO catalog record. The exact file name (matching upper and lower case) must be entered in the catalog record to make a link between records and associated files. The Related Document Relationship (RDR) and Related Document Description (RDD) are also required.
• Validation routines will test to ensure that all files cited are present and that all files contributed are referenced in a record.

See other parts of the AMICO Data Specification