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Integrated Hydrologic Forecast System (IHFS) Software Architecture
 
Table of Contents

Section 1 Introduction
    1.1   Purpose
    1.2   Characterization of the IHFS Architecture
    1.2.1 Interactive Interface Layer
    1.2.2 IHFS Applications Layer 
    1.2.3 IHFS Infrastructure Layer
    1.2.4 AWIPS Layer

Section 2 IHFS Architectural Requirements
    2.1   Driving Requirements
    2.2   Architectural Constraints 
    2.3   Architectural Requirements

Section 3 Target IHFS Architecture
    3.1   Interactive Interface Layer
    3.2   IHFS Infrastructure Layer Architecture.
    3.2.1 Application Control Services
    3.2.2 Application Communication Services
    3.2.3 Data Access Services
    3.3   IHFS Applications Layer Architecture

Section 4 Transitional IHFS Architectures and Strategies
    4.1   IHFS Infrastructure
    4.2   IHFS Interactive Interface
    4.3   IHFS Applications

Section 5 Implementation Technologies and Standards

Section 6 Architecture Requirements Satisfaction

Section 7 Open Issues

Section 8 Currently Defined IHFS Services Interfaces
    8.1   IHFS Infrastructure Layer APIs for Data Access Services
    8.2   IHFS Infrastructure Layer APIs for Application Control and Communication

Section 9 Discussion of Other Options Considered
    9.1   Data Structure Storage and Synchronization: RFC and WFO
    9.2   D2D Architectural Issues
    9.3   Informix Architectural Issues
    9.4   Application Data Access Services Function Interface
    9.4.1 Data Retrieval
    9.4.2 Data Storage
    9.4.3 Logical Data Storage Organization
                                    
Appendix A Example Code Use of Procedural Data Access APIs

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