ASTM_E_1708_-_14.pdf

Designation:E170814Standard Practice forElectronic Interchange of Color and Appearance Data1This standard is issued under the fixed designation E1708;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers procedures to be used in theelectronic exchange of color and appearance data betweenusers,by either modem or the physical transfer of electronicmedia.It is intended for use by manufacturers of color-measuring instruments and developers of software so that anyinstrument may acquire data for its use that may have beenmeasured on an instrument of another manufacturer,at anotherplace,or at another time.1.2 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E284 Terminology of Appearance3.Terminology3.1 Definitions of terms in Terminology E284 are applicableto this practice.3.2 Definitions of Terms Specific to This Standard:3.2.1 data value identifier,na keyword that identifies thecontents of a data field and,by definition,signals the data typeof the field as string,integer,or floating point.3.2.2 keyword,nin electronic interchange,an alphanu-meric designator that defines the nature or number of followingdata fields.3.2.2.1 DiscussionThe word is used in its ordinary dic-tionary sense in Section 7.3.2.3 white space,na valid character representation thatdoes not generate a printable character in a file.3.2.3.1 DiscussionValid ASCII white space characters arespace(decimal 32),carriage return(decimal 13),form feed(decimal 12),vertical tab(decimal 11),newline(decimal 10),and horizontal tab(decimal 9).4.Summary of Practice4.1 Users of this practice are given a mandatory list ofkeywords.The user fills out the list with the data valuesassociated with each keyword.The user may then select froman optional list of keywords.The user then associates withthese keywords the data values required to be transmitted.4.2 The keywords are used at the receiving end of thetransmission to decode the format and number of data valuespresent in the transmission.5.Significance and Use5.1 This practice should be used by manufacturers ofcolor-measuring instruments and developers of software whenthe transmission of color and appearance data is desiredbetween instruments or computers and where ASCII files arethe desired method of transfer.5.2 The method of transmission may be via directconnection,modem,or the transfer of electronic media,forexample,by floppy disk transfer.5.3 The practice lends itself to the transmission of either asingle record of data or multiple record files.5.4 Examples of files generated in this practice are con-tained in Fig.X1.1 and Fig.X2.1 of Appendix X1 andAppendix X2.6.Procedure6.1 Prepare a file using ASCII code that consists of themandatory keyword list followed by the associated data values.Each keyword and each data value is delimited by white space.The record may be organized into logical units associated witheach keyword by using the carriage return character for thewhite space delimiter at the end of the data values associatedwith any keyword.6.1.1 Every keyword in the record must be followed by atleast one character of white space as a delimiter.Do notprecede keywords on a line by other than white space.Theexception to this recommendation,which is made to assist1This practice is under the jurisdiction of ASTM Committee E12 on Color andAppearance and is the direct responsibility of Subcommittee E12.04 on Color andAppearance Analysis.Current edition approved May 1,2014.Published May 2014.Originallyapproved in 1995.Last previous edition approved in 2007 as E1708 95(2007).DOI:10.1520/E1708-14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 human readability,is the use of keywords as data valueidentifiers,which are listed in order on one line,if possible,sothat they may be interpreted by the human reader as columnheadings.6.1.2 The specification of data value identifiers is entirelyoptional regarding the choice and number of identifiers.Datavalue identifiers are placed between the BEGIN_ DATA_FORMAT keyword and the END_DATA_ FORMAT keyword.Each data value identifier must be separated by at least onecharacter of white space.6.2 Mandatory KeywordsThe following keywords aremandatory in a record:6