The Application Level Events (ALE) Specification, Version 1.0 - GS1

800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
8.2.6 ECReportSetSpec
ECReportSetSpec is an enumerated type denoting what set of EPCs is to be
considered for filtering and output: all EPCs read in the current event cycle, additions
from the previous event cycle, or deletions from the previous event cycle.
CURRENT
ADDITIONS
DELETIONS
8.2.7 ECFilterSpec
An ECFilterSpec specifies what EPCs are to be included in the final report.
includePatterns : List // List of EPC patterns
excludePatterns : List // List of EPC patterns
---
The ECFilterSpec implements a flexible filtering scheme based on two pattern lists.
Each list contains zero or more EPC patterns. Each EPC pattern denotes a single EPC, a
range of EPCs, or some other set of EPCs. (Patterns are described in detail below in
Section 8.2.8.) An EPC is included in the final report if (a) the EPC does not match any
pattern in the excludePatterns list, and (b) the EPC does match at least one pattern
in the includePatterns list. The (b) test is omitted if the includePatterns list
is empty.
This can be expressed using the notation of Section 4 as follows, where R is the set of
EPCs to be reported from a given event cycle, prior to filtering:
F(R) = { epc | epc ∈ R
& (epc ∈ I 1 | … | epc i∈ I n )
& epc ∉ E 1 & … & epc ∉ E n }
where I i denotes the set of EPCs matched by the ith pattern in the includePatterns
list, and E i denotes the set of EPCs matched by the ith pattern in the
excludePatterns list.
8.2.8 EPC Patterns (non-normative)
EPC Patterns are used to specify filters within an ECFilterSpec. The normative
specification of EPC Patterns may be found in the EPCglobal Tag Data Specification
Version 1.1 [TDS1.1]. The remainder of this section provides a non-normative summary
of some of the features of that specification, to aid the reader who has not read the
EPCglobal Tag Data Specification in understanding the filtering aspects of the ALE API.
Copyright © 2005, 2004 EPCglobal Inc, All Rights Reserved. Page 27 of 71