Introduction

Architecture

  Data Representation

    Choice Sets

   External Vocabularies

  Time-stamping of data

  Software Infrastructure

  Data Input

    Summary of Web Forms

  Data Output

    Standard Reports

    Data Extracts

    Ad Hoc Query

Recent Enhancements

  Data Import

Range Checks

  Required Fields

  Skip logic

  Hierarchical choice sets

  Audit trail maintenance

  Problem Notes

  User-specific Security

  Top-down study design

  Linkage of Attributes to External Vocabularies

  Multi-study scenario

  Multi-institutional Scenario