You can find the PI Web API White Paper on PI Square here.
This repository is organized by chapters from the Developing with PI Web API White Paper.
You will need a development PI System, and a working instance of the PI Web API server.
Copyright 2015 OSIsoft, LLC
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.