NAME
    TAP::Formatter::EARL - Formatting TAP output using the Evaluation and
    Report Language

SYNOPSIS
    Use on the command line:

      prove --formatter TAP::Formatter::EARL -l

DESCRIPTION
    This is a formatter for TAP-based test results to output them using the
    Evaluation and Report Language <https://www.w3.org/TR/EARL10-Guide/>,
    which is a vocabulary based on the Resource Description Framework (RDF) to
    describe test results, so that they can be shared, for example as part of
    an audit.

    This module has a number of attributes, but they are all optional, as they
    have reasonable defaults. Many of them can be set using environment
    variables. It further extends TAP::Formatter::Console.

  Attributes
    *   `model`

        An Attean mutable model that will contain the generated RDF triples. A
        temporary model is used by default.

    *   `ns`

        A URI::NamespaceMap object. This can be used internally in programming
        with prefixes, and to abbreviate using the given prefixes in
        serializations. It is initialized by default with the prefixes used
        internally.

    *   `graph_name`

        An Attean::IRI to use as graph name for all triples. In normal
        operations, the formatter will not use the graph name, and so the
        default is set to `http://example.test/graph`. Normal coercions apply.

        It can be set using the environment variable `EARL_GRAPH_NAME`.

    *   `base`

        An Attean::IRI to use as the base URI for relative URIs in the
        serialized output. The default is no base. Normal coercions apply.

        It can be set using the environment variable `EARL_BASE`.

    *   `software_prefix`, `assertion_prefix`, `result_prefix`

        Prefixes for URIs of the script running the test, the assertion that a
        certain result has been found, and the result itself, respectively.

        They accept a URI::Namespace object. They have relative URIs as
        defaults. These will not be set as a prefix in the serializer. Normal
        coercions apply.

        They can be set using environment variables, `EARL_SOFTWARE_PREFIX`,
        `EARL_ASSERTION_PREFIX` and `EARL_RESULT_PREFIX`, respectively.

  Methods
    These methods are specialised implementations of methods in the superclass
    TAP::Formatter::Base.

    *   `open_test`

        This is called to create a new test session. It first describes the
        software used in RDF before calling TAP::Formatter::EARL::Session.

    *   `summary`

        Serializes the model to Turtle and prints it to STDOUT.

TODO
    This is a rudimentary first release, it will only make use of data parsed
    from each individual test result.

    EARL reports can be extended to become a part of an extensive Linked Data
    cloud. It can also link to tests as formulated by e.g.
    Test::FITesque::RDF.

BUGS
    Please report any bugs to
    <https://github.com/kjetilk/p5-tap-formatter-earl/issues>.

SEE ALSO
AUTHOR
    Kjetil Kjernsmo <kjetilk@cpan.org>.

COPYRIGHT AND LICENCE
    This software is copyright (c) 2019 by Inrupt Inc

    This is free software, licensed under:

      The MIT (X11) License

DISCLAIMER OF WARRANTIES
    THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
    WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
    MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.