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PatternQuery:Principles

5 bytes removed, 03:28, 17 December 2014
Example, Part One
==Example, Part One==
'''Goal: Find all HET residues in a protein.'''
Let’s assume we have loaded a protein stored in a PDB or mmCIF file with correctly annotated HET groupsand we want to find all HET residues in it.
The characteristics of an imperative approach is explicitly stating steps that need to be performed in order achieve a particular goal. In contrast a declarative approach states the goal we would like to achieve, leaving the individual steps as an "implementation detail".

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