British National Formulary (BNF) 54: September 2007 (v. 54)

British National Formulary (BNF) 54: September 2007 (v. 54)

BNF - click on the image below for more information.

BNF

Compiled with the advice of clinical experts, this essential reference provides up-to-date guidance on prescribing, dispensing and administering medicines. The "BNF" details medicines prescribed in the UK, with special reference to their uses, cautions, contraindications, side-effects, dosage and relative costs.Updated in print every six months, the "BNF" reflects current best practice as well as legal and professional guidelines relating to the use of medicines.The "BNF" is also available online as part of Medicines Complete, on PDA and on also CD-ROM for intranets.

British National Formulary (BNF) 54: September 2007 (v. 54)

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Someone explain BNF and EBNF in an easy to understand way to a novice software designer ;)?

Best answer:
BNF ("Backus-Naur form") is a way to specify the grammatical structure of a language. For example, you could describe the language of mathematical expressions as something like...

::= , ,
| , ,
| ;

Then, an expression can be just a number (e.g. "3"), or two expressions joined by an operator (e.g. "3 + 5"), or parentheses around another expression (e.g. "(3)"), or some nested combination (e.g. "3 + (9 - 4) ^ 2").

It's normally used to describe the syntax of a programming language; there are tools used for writing compilers/interpreters that take a description of the grammar in BNF (or EBNF) and produce code that can read in a program and break it down into its syntactic components. EBNF ("extended Backus-Naur form") extends the syntax to include optional or repeated sections, such as

list = { element };
number = [ sign ] { digit };

Any grammar that can be described in EBNF can also be described in BNF, but EBNF often makes the description simpler.

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Orignal From: British National Formulary (BNF) 54: September 2007 (v. 54)