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    Chapter 1. XML Powered Web Forms > XForms at a Glance

    1.5. XForms at a Glance

    Table 1.1 shows the various XForms components at a glance; this also serves as a road map for the rest of this book. For each component, we enumerate its role in the XForms architecture, the underlying technology used by the component, and its concomitant benefits.

    Table 1.1. XForms at a Glance
    ComponentDescription
    Model

    • Encapsulates all data aspects of a form

    • Uses XML Schema to define constraints

    • Uses XPath to define model properties

    • Attaches model properties to instance nodes

    • Captures what, how, and where to submit

    Properties

    • Capture application constraints

    • Enable reactive user interfaces

    UI Binding

    • Connects user interface to the model using XPath

    UI Controls

    • Collect user input

    • Bind to underlying model

    • Encapsulate all relevant metadata

    • Access by design

    • Encourage device independence

    UI

    • Aggregates user interface controls

    • Encourages intent-based authoring

    • Creates dynamic user interaction

    Events

    • Bring user interface to life

    • Give access to eventing via XML Events

    • Attach dynamic behavior

    • Obviate common use of scripts via declarative actions