The ?¬?lter value is used to provide for a fast ?¬?ltering and preselection of basic logistic
types, where 000 de?¬?nes all types, 001 is reserved for Retail Consumer Trade Items,
010 for Standard Trade Item Groupings, 011 for Single Shipping Trade Items, and the
other four are reserved. Different identity types have different encodings for the ?¬?lter
value.
The partition value is to provide combinations of company pre?¬?x and item reference; for
example, some organizations may need a large number of reference items, whereas others
may need fewer than 16. For example, the SGTIN 7 combinations are de?¬?ned. Different
identity types have different encodings for the partition value.
EPCglobal Network 25
2.5 Tag Data Translation
The Tag Data Standards earlier describe how to translate between three representations of
the EPC, namely the binary format (stored in the tags EPC Memory Bank) and two formats
of URI, one for tag-encoding and another for pure identity. URIs are intended for communicating
and storing EPCs in information systems, databases and applications, to insulate
those systems from knowledge about the physical nature of the tag. The tag-encoding URI
provides a one-to-one mapping with the binary number recorded in the physical tag and as
such indicates the bit length of the tag and may also include an additional ?¬?lter ?¬?eld.
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