问题
We are implementing GS1 linear barcodes (Code 128, Code 39) and GS1 2D barcodes (Data Matrix, PDF41 [sic]) and also GS1 DataBar barcodes in our application. Since I am new to this, I have few questions regarding GS1-type barcodes.
- What is the relation between GS1 standard barcodes and generic barcode symbols?
- Can any text be made into GS1-type barcode (e.g. GS1 DataMatrix) or does the text have to follow a certain mandatory format?
Thanks in advance.
回答1:
A quick nit: There is no such format as a GS1 Code 39 nor "PDF41" (I presume that you meant PDF417 but as with Code 39 this is not a GS1-adopted carrier symbol.)
With the exception of the purpose-designed GS1 DataBar family of barcodes the remaining GS1 barcode symbologies are "application standards" of various general-purpose ISO/IEC barcode standards adapted for dedicated use within the supply chain industry and are specified by the GS1 General Specifications. Each format was created as a specialisation of some pre-existing carrier symbology (Code 128, Data Matrix, QR Code), meaning that they work within the limits of the existing specification to produce a more-restricted, special-purpose variant that is optimised for use in their particular application – for example by reducing the range of available symbol sizes, applying constraints on the data capacity and specifying a particular structure for the encapsulated data.
With regard to having a mandatory data structure, where available in the carrier symbology the GS1 specialisations mandate the use the "FNC1 in first position" mechanism to indicate the presence of data that conforms to the GS1 Application Identifier standard format described by the GS1 specifications. The product data is thus represented within this standard format and encoded within the carrier symbol using a scheme that is broadly similar across the GS1 symbologies.
The "extraction" part of this answer gives details of formatting data according to the GS1 AI standard format structure.
来源：https://stackoverflow.com/questions/34427036/what-is-the-relationship-between-gs1-standard-barcodes-and-generic-barcode-symbo