close this bookVolume 4: No. 04
View the document Funding news
View the document Copyright law
View the document Scholarly publishing
View the document Electronic reporting
View the document Information retrieval
View the document Document delivery
View the document Projects and urgent news
View the document Job opportunities
View the document Linguistics
View the documentSoftware development
View the documentComputists' news

Thinking about going to multimedia email? A 10-page article scanned at Group 3 TIFF/Fax resolution can take 2MB. uuencoding for ASCII transmission adds 33%. [Ted Koppel (tkoppel@carl.org), PACS-L, 1/7/94.] Then again, images seen on Internet rarely exceed 300KB. GIF (.gif) coding is smaller than JPEG (.jpg), and ZIPing can compress uuencoded images. [Michael Salmons (msalmons@bigcat.missouri.edu).] BinHex (.hqx) also add 33%, but can handle Macintosh resource forks. .Z or .gzip compression is less DOS-oriented than .zip. [Fearghas McKay (fearghas@challis.demon.co.uk), 1/10/93.]

The original internet mail specification, RFC 821, limited messages to 7 bits and 1000 characters per line. MIME was developed to encapsulate graphics and other 8-bit or lengthy data. New data types can be added, but the base standard has not changed since 6/92. MIME-compliant mailers include Pine, Eudora, elm, MH, xmh, metamail, MailManager, XLView/Ximap, Zmail, mail, xmail, mailtool, emacs rmail, emacs vm, AMS (Andrew Mail system),and Quickmail. WWW and Gopher also incorporate MIME. [Tony Barry (tony@info.anu.edu.au), PACS-L, 1/20/94.]

Document Delivery by X.400 (DDX) is an alternative to MIME, designed for high-volume applications. A prototype system at UEast Anglia uses X.400 88 for document images in TIFF format with Gp4 compression. Messages typically exceed 1MB, and plans include 2M documents/year to 200K clients at 2K institutions. Libraries are expected to handle all DDX ordering, printing, and distribution, ensuring that electronic copies do not reach the end user. [Bill.Tuck@london.british-library.uk, PACS-L, 1/25/94.]