GS1 EPC Tag Data Standard 1.6 - Indicod-Ecr

4943494449454946to determine which of the first 8 Packed Objects on the tag contain the desired data item.If an optional ObjectOffsets subsection was encoded, then the Interrogator can calculatethe starting address of the desired Packed Object directly; otherwise, the interrogator mayperform successive read operations in order to fetch the desired Packed Object.4947Appendix JPacked Objects ID Tables49484949495049514952495349544955495649574958495949604961496249634964496549664967J.1 Packed Objects Data Format registration file structureA Packed Objects registered Data Format file consists of a series of “Keyword lines” andone or more ID Tables. Blank lines may occur anywhere within a Data Format File, andare ignored. Also, any line may end with extra blank columns, which are also ignored. A Keyword line consists of a Keyword (which always starts with “K-“) followed byan equals sign and a character string, which assigns a value to that Keyword. Zero ormore space characters may be present on either side of the equals sign. SomeKeyword lines shall appear only once, at the top of the registration file, and othersmay appear multiple times, once for each ID Table in the file. An ID Table lists a series of ID Values (as defined in I.5.3). Each row of an ID Tablecontains a single ID Value (in a required “IDvalue” column), and additional columnsmay associate Object IDs (OIDs), ID strings, Format strings, and other informationwith that ID Value. A registration file always includes a single “Primary” Base IDTable, zero or more “Alternate” Base ID Tables, and may also include one or moreSecondary ID Tables (that are referenced by one or more Base ID Table entries).To illustrate the file format, a hypothetical data system registration is shown in Figure J-1. In this hypothetical data system, each ID Value is associated with one or more OIDsand corresponding ID strings. The following subsections explain the syntax shown in theFigure.Copyright ©2005- 2011 GS1 AISBL, All Rights Reserved. Page 191 of 218