• User Guide
• Introduction
• Logging In and Out
• Your ISIS Home Page
• Viewing a List of Stations
• Viewing Station History
• Viewing Event Details
• Adding a New Event
• Saving an Event to Complete Later
• Returning to an Unfinished Event
• Correcting an Event
• Adding a Station to the ISIS Database
• Authentication

Introduction to ISIS

The core of the ISIS data model consists of the concepts of stations, networks, events, fields, and values. Stations are grouped into networks --- each station is a member of exactly one network. ISIS can support an arbitrary number of networks, each containing an arbitrary number of stations. Station information is stored in fields which have values that change over time. An “event” for a station is a change to the value of one or more of that station’s fields. ISIS tracks the history of the values of each station’s fields by storing a sequence of events for that station. Associated with each event is a list of the fields changed by that event, and their new values.