The MARBEN XSD Tools for C encompass an XML Schema (XSD) Compiler, and pure C ASN.1 BER, DER, PER (both aligned and unaligned variants), XER (XML Encoding Rules - both basic and canonical variants) and E-XER (Extended XER) encoding/decoding engines providing a C API. The C API is a set of C structures generated by the XSD Compiler and depending on the input XML Schema (a C structure is generated for each XML Schema element or type).




XSD Compiler

The XSD Compiler takes in input an XML Schema definition, performs syntax and semantic checks and produces, if needed, the corresponding error messages. It generates C structures associated with the XML schema elements and types and an information table that the runtime will use to encode/decode data. The XSD compiler supports all XML Schemas that conform to [W3C-XSD].


XSD Runtime

The XSD Runtime provides encoding/decoding services as well as constraints check and traces services. The user application has access to the C BER, DER, PER, XER and E-XER encoding/decoding services through the C API generated by the XSD Compiler. The XSD Runtime also offers customization mechanism for the adaptation and the porting of the application in various environments.

The C API is user-friendly. To each type and element of the input XML schema definition corresponds a C structure. To encode or decode a value, the PER, BER, DER, XER or E-XER encoding or decoding function has simply to be called.