ASTM_G_135_-_95_2013.pdf

Designation:G13595(Reapproved 2013)Standard Guide forComputerized Exchange of Corrosion Data for Metals1This standard is issued under the fixed designation G135;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 guide covers the techniques used to encode corro-sion of metals test results for exchange between computersystems.1.2 Guidelines are given for creating a data exchangeappendix for each ASTM corrosion of metals standard.1.3 Instructions are given for creating data translation soft-ware from the contents of the data exchange appendix.2.Referenced Documents2.1 ASTM Standards:2G106 Practice for Verification of Algorithm and Equipmentfor Electrochemical Impedance MeasurementsG107 Guide for Formats for Collection and Compilation ofCorrosion Data for Metals for Computerized DatabaseInput2.2 ANSI Standards:3ANSI/ISO 9899 1990 1992 Programming Language CANSI X3.4-1986 Coded Character Set 7 Bit ASCII3.Terminology3.1 Definitions:3.1.1 datatypea group of rules specifying the format of anobject.3.1.2 global datainformation shared among several stan-dards.3.1.3 local datainformation specific to a certain standard.3.1.4 semanticsinformation meaning.3.1.5 syntaxinformation format.3.1.6 tagged objecta named block of information.3.1.7 translatora computer routine which writes or readsdata files.4.Significance and Use4.1 This guide establishes a formalism for transferringcorrosion test data between computer systems in differentlaboratories.It will be used by standards developers to specifythe format of files containing test results.4.2 This guide defines a generic approach to structuring datafiles.It will be used by software developers to create programswhich read and write these files.4.3 Each standard test procedure will define a unique datafile derived from this guide.Each time a standard test isperformed,the results can be summarized in a data file specificto that test.4.4 Some experimental information will be global,that is,common to several standards,and will be contained in GuideG107 and other global data dictionaries.Other information willbe local,that is,unique to a given standard,and will be definedin that standard.5.Guide for Standards Authors5.1 Local and Global Data:5.1.1 Some information may be used across several corro-sion standards,that is,global.Global data is defined in GuideG107 and other global standards.5.1.2 Some information may be local to a particular corro-sion standard.Local data is defined in the standards dataexchange appendix.5.2 Data File:5.2.1 Each test will generate a single test data file.File nameformats are not specified.5.2.2 The data file is arranged as a set of named or taggedobjects.Each time a standard test is performed a set of objectsis obtained.The data file can be thought of as a permanentrepository for this set of objects.5.2.3 Each tagged object will take two or more lines in thedata file.Lines are strings of ASCII(ANSI X3.4-1986)characters terminated with a carriage return/linefeed characterpair or a single linefeed character.1This guide is under the jurisdiction of ASTM Committee G01 on Corrosion ofMetals and is the direct responsibility of Subcommittee G01.05 on LaboratoryCorrosion Tests.Current edition approved May 1,2013.Published July 2013.Originally approvedin 1995.Last previous edition approved in 2007 as G13595(2007).DOI:10.1520/G0135-95R13.2For 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.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.2.4 Lines are further subdivided into tab delimited ASCIIfields that are particularly suitable for manipulation by spread-sheet and scientific charting programs.For example,Fig.1shows how a section of a data file would show up on printedoutput.5.3 Tagged Object:5.3.1 A tagged object is a repository for an individual blockof information.It may be a simple piece of data,the test datefor example,or it may be complex,such as a current/voltage/time curve.A tagged object contains three subordinate areas:(1)the tag,(2)the datatype,and(3)the actual data.The tagand datatype are the first two fields of the first line while theactual data is contained in subsequent lines.Data lines arealways indented one tab space.This is illustrated in Fig.2.5.3.2 Tag:5.3.2.1 The objects tag is a simple string that uniquelyidentifies it among other objects in a tagged object set.5.3.2.2 When implementing a translator for a givenstandard,the i