User guide
Constretto user guide
Work in progress
The Constretto user guide is a work in progress, I will add sections, mostly due to questions asked to me about how it works. Also please feel free to add content here 
Constretto configuration tags.
How to configure
Rules for resolving values
When tags are listed in the -DCONSTRETTO_TAGS system property, the priority is from left to right.
I.e. if a property file (e.g. environment.properties) contains multiple properties that apply for a given set of tags, then the tags in the -DCONSTRETTO_TAGS listing take precedence from left to right.
In addition, when the same property is defined in multiple files, the last file (property) read in will be used.
Summary of property resolving rules when multiple properties can apply:
tags: left -> right
overriding of keys: last -> first