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Component Model Methodology

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Here are the guidelines for understanding the problem of and developing specification for the Component Model.


  1. Capture requirements as use cases;
  2. Study use cases and extract a set of desired properties for these use cases;
  3. Come with a design that satisfies all desired properties;
  4. Extrude building blocks out of the design;
  5. Write specification draft(s) for the building blocks;
  6. Cultivate implementation feedback:
    • Provide experimental implementation(s) for the building blocks;
    • Seek feedback from the use case audiences;
    • Incorporate feedback into specification.
  7. Write a test suite.
  8. Iterate until success criteria is reached.

Success criteria

  • The use cases:
    • reasonably cover a set of component model needs on the Web.
  • The properties:
    • completely describe the set of use cases;
    • are orthogonal to each other.
  • The building blocks:
  • The specification:
    • is a complete set of requirements for all building blocks and corner cases, discovered during implementation;
  • The test suite:
    • provides coverage for each requirement in the specification.

Design Principles

  • Reuse existing mechanisms as much as possible, gently extending them if necessary;
  • Study popular patterns in existing Web frameworks and pave the cowpaths when appropriate;
  • Encourage each building block to stand on its own merits.