The different codings
All barcode codings have not the same use
Very many codings have been invented to meet different needs and to enjoy over the years of technological improvements. TransBar offers only those that are actually used.
You will find:
- on this website:
- a guide of choice by coding
- a guide of choice by use
- a guide of choice by keyword
- a guide of choice by drawing
- in the tab "Set coding" of TransBar a quick guide of choice by name, family, keywords or use
These codings fall into two categories:
- symbologies, internationaly defined. All readers are likely to recognize the barcodes of all symbologies, provided they are not constrained by a particular setting;
- standards that meet a specific need and defined by a profession, or a business or an administration. Each standard is based on a symbology and it adds special rules in one or more of the following:
- location of the barcode;
- dimensions to comply;
- composition of the data to be transmitted;
- composition of the "stored data" as a function of "transmitted data" (eg data compression or appending of control chars);
- presence, location and composition of a caption for human reading of the "transmitted data".
According to the standard, readers should be set in a special way to convey "transmitted data" rather than "stored data".