Definate is part of Capirca and is a system to develop and manage network
definitions that can be used in Capirca policies.
It was developed by Google for internal use, and is now open source.

Project home page: http://code.google.com/p/capirca/

Please send contributions to capirca-dev@googlegroups.com.

Code should include unit tests and follow the Google Python style guide:
http://code.google.com/p/soc/wiki/PythonStyleGuide

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Definate Configuration File

Global section
  This section contains directives global in scope.

  [pre|post]_filters: Optional list of global filters to run before
    (pre_filters) or after (post_filters) the definition file generation.
    Each filter may define a set of filter specific arguments in the 'args'
    attribute.
    'name': Name of the filter used to lookup the filter class to use.
      Valid values: There are currently no implementations.
  per_file_[pre|post]_filters: Optional list of file filters run before
    (pre_filters) or after (post_filters) the generation of each file.
    The pre_filters here are run BEFORE the individual filters specified in
    the files section and the post_filters are run AFTER the individual
    filters specified in the files section.
    For a list of possible filters and arguments, see the "Files section".
  per_definition_[pre|post]_filters: Optional list of definition filters run
    before (pre_filters) or after (post_filters) the generation of each
    definition.
    The pre_filters here are run BEFORE the individual filters specified in
    the definitions section and the post_filters are run AFTER the individual
    filters specified in the definitions section.
    For a list of possible filters and arguments, see the "Definitions
    section".

Files section
  This section contains a list of settings and configurations for each
  file that gets generated.

  path: Path to the definitions file to be generated, relative to the
    def path defined in the global section.
  [pre|post]_filters: Optional list of file level filters to run before
    (pre_filters) or after (post_filters) the file has been generated.
    Each filter may define a set of filter specific arguments in the
    'args' attribute.
    'name': Name of the filter used to lookup the filter class to use.
      Valid values:
        'PrintFilter': Does not modify input. Just prints it.
        'WriteFileFilter': Writes files out locally.
  file_header: List of strings that get printed in the beginning of the file.
  generators: List of generator blocks.

Generators section
  name: The generator defines the source of the information.
    Valid values:
      'DnsGenerator': For definitions generated based on hostnames with a simple
        DNS resolver. Note that the resolver might not return all addresses used
        for one hostname depending on the implemented DNS load balancing.
  definitions: List of definition blocks.

Definitions section
  name: Name of the definition that gets generated. This name is used in the
    definitions file and can be used in policies to reference the definition.
  header: Optional list of header strings that will be printed before the
    definition.
  [pre|post]_filters: Optional list of definition level filters to run
    before (pre_filters) or after (post_filters) the definition has been
    generated. Each filter may define a set of filter specific arguments
    in the 'args' attribute.
    'name': Name of the filter used to lookup the filter class to use.
      Valid values:
        'SortFilter': Sort the input list and return one list containing
          IPv4 sorted, IPv6 sorted.
        'AlignFilter': Take the input list and definition name and create
          nicely formated output.
  networks: Contains  a list of descriptions about how to get a complete set
    of networks/IPs for one definition. This section contains
    generator-specific configuration directives".

Network directives for DnsGenerator

Networks section
  names: List of hostnames that should be resolved.
  types: List of types the output should be filtered for. Valid values:
    'A': Filter for IPv4 addresses.
    'AAAA': Filter for IPv6 addresses.