Precedence in the matrix

A defining feature of HTTP Switchboard is the precedence/graylisting/inheritance concept in the matrix.

A "graylisted" matrix cell (pale green or pale red) means the cell inherits its allow or block status from a higher precedence cell in the matrix.

This feature allows the user to whitelist or blacklist a whole group of cell with a single click on a higher precedence cell in the matrix. Here is the tree list of precedence/inheritance of the matrix:

• The all cell (top-left corner of the matrix)
  • Types cells (cookie, css, img, etc.)
    • Specific type and specific domain names
      • Specific type and specific subdomain names
  • Domain name cells (wikipedia.org, facebook.com, wired.com, etc.)
    • Subdomain name cells (en.wikipedia.org, www.facebook.com, video.wired.com, etc.)
      • Specific type and specific subdomain names
    • Specific type and specific domain names
      • Specific type and specific subdomain names

Any explicit whitelist or blacklist status of a cell will cascade down through inheritance to the graylisted cells in the next level. Ultimately, this means that it is possible to control all the cells in the matrix with just the top-left all cell.