SDXF

SDXF stands for "Structured Data eXchange Format".

This Format is also published as an Internet RFC (see http://www.ietf.org/rfc/rfc3072.txt or for a structured hypertext format: http://www.zvon.org/tmRFC/RFC3072/Output/index.html

The purpose of this format: arbitrary structured data of different types are assembled together for exchanging between computers of different architectures.

With SDXF you can structure your data to any level of detail. The particular data elements (called "Chunks") are self-describing. The format is very simple, but nevertheless transparent to the programmer, he does not need and should not care about the bits and bytes of the structure. To access and create the structure the programmer uses a set of functions. But "not caring" does not mean "not knowing": He must already know how SDXF works.

The exchanging of data between computers of different archicture is realized by a transparent transformation of the data to a normalized (network) form. This is done by the set of SDXF-functions.

It may be that the imagining of a SDXF data structure as an administration building will be helpful: This building has a main entrance, you "enter" (this is the name of a SDXF-function) the building and you come into a corridor with some doors: behind some doors there is a bureau of a clerk, behind others there are other corridors with doors (which can also conceal corridors and doors, and so onů). On every door the name of the clerk or the indication of the corridor is to read, and: you can distinguish between a door and a corridor. So you can walk from one door to the "next" (this is another name of a SDXF-function). If you open a door of a corridor you can "enter" it, too. If you open a door of a bureau you can "extract" (yes, also a function) information from the clerk (I hope).

Additionally to the adaptation of the data, there are two other functions which will work in the background while using the SDXF functions:

Compressing/decompressing and encryption/decryption.

You can use SDXF also as a file format, maybe as a basic for a data base.

The possibility to structure your data to an arbitrary depth is reminiscient somehow of XML, but SDXF is not a text format (as XML), you cannot manipulate a SDXF structure with a text editor.

This is the Introduction chapter of a more detailed description which can be found on http://www.pinpi.com/SDXF.htm


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