#!/usr/bin/env perl
use v5.14.1;
use App::picadata;

App::picadata->new(@ARGV)->run;

__END__

=head1 NAME

picadata - parse and validate PICA+ data

=head1 SYNOPSIS

picadata [<command>] {path} {options} {files}

=head1 DESCRIPTION

Convert, analyze and validate PICA+ data from the command line.

=head1 COMMANDS

=head2 convert

Convert between PICA+ serialization formats (the default command).

=head2 get

Print subfield values.

=head2 levels

Split records into multiple records for each level. Implies C<-o>.

=head2 join

Join multiple records into one and sort afterwards.

=head2 count

Count number of records, holdings, items, and fields.

=head2 filter

Filter records that include any of some given (sub)fields.

=head2 fields/subfields/sf

List distinct fields or subfields in the data. Provide an Avram schema 
(C<-s/--schema>) to include documenation.

=head2 explain

Lookup (sub)fields in an Avram schema given by option or from stdin.
Optional (C<o>/C<*>), mandatory (C<.>/C<+>), repeatable (C<+>/C<*>).

=head2 validate

Validate data against an Avram schema (C<-s/--schema>).

=head2 diff

Compare PICA records from two inputs. Output is always annotated PICA Plain.

=head2 patch

Apply modifications given in annotated PICA Plain.

=head2 modify

Change subfield values and return result or patch (option C<-a>).

=head2 build

Build an Avram schema from input data, optionally based on an existing schema
(C<-s/--schema>).  Add option C<-B/--abbrev> to abbreviate.

=head1 OPTIONS

=head2 --from, -f

PICA serialization type (plain, plus, binary, XML, ppxml, pixml) with Plain as
default. Guessed from first input filename unless specified. See format
documentation at L<http://format.gbv.de/pica>.

=head2 --to, -t

PICA serialization type to enable writing parsed PICA data.

=head2 --number, -n

Stop parsing after C<n> records. Can be abbreviated as C<-1>, C<-2>...

=head2 --order, -o

Sort record fields by field identifier and by occurrence at level 2.

=head2 --annotate, -a, -A

Enforce annotated PICA as output format or prevent with C<-A>. Combined with
C<--schema> this will set annotations C<!> and C<?> to mark validation errors.

=head2 --path, -p

Select fields or subfield values specified by PICA Path expressions. Multiple
expressions can be separated by C<|> or by repeating the option. Positions such
as C</3-7> are read as occurrence ranges. 

=head2 --schema, -s

L<Avram Schema|http://format.gbv.de/schema/avram/specification> given by
file or URL. Default set via environment variable C<PICA_SCHEMA>.

=head2 --unknown, -u

Report unknown fields and subfields on validation (disabled by default).

=head2 --abbrev, -B

Abbreviate the Avram schema (with command <build>).

=head2 --color, -C

Colorize output. Only supported for PICA plain and PICA plus format.

=head2 --mono, -M

Monochrome (don't colorize output).

=head2 --version, -V

Print version number and exit.

=head1 EXAMPLES

  picadata pica.dat -t xml                    # convert binary to XML
  picadata count -f plain < pica.plain        # parse and count records
  picadata 003@ pica.xml                      # extract field 003@
  picadata validate pica.xml -s schema.json   # validate against Avram schema
  picadata modify 021A.a "New Title" pica.pp  # modify subfield value

  # document fields used in a record
  picadata fields pica.xml -s https://format.k10plus.de/avram.pl?profile=k10plus

=head1 SEE ALSO

See L<catmandu> for a more elaborated command line tool for data processing
(transformation, API access...), including PICA+ with L<Catmandu::PICA>.

=cut