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.IX Title "MARC::Spec::Subfield 3pm"
.TH MARC::Spec::Subfield 3pm "2018-01-12" "perl v5.26.1" "User Contributed Perl Documentation"
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.SH "NAME"
MARC::Spec::Subfield \- subfield specification
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    use MARC::Spec;
\&    
\&    my $ms = MARC::Spec\->new(\*(Aq245$a/0\-2);
\&    say ref $ms\->subfields;                     # ARRAY
\&    say ref $ms\->subfields\->[0];                # MARC::Spec::Subfield
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
MARC::Spec::Subfield is the subfield specification of a MARC::Spec.
.PP
See MARCspec \- A common \s-1MARC\s0 record path language <http://marcspec.github.io/MARCspec/> for further 
details on the syntax.
.SH "METHODS"
.IX Header "METHODS"
Some methods are inherited from MARC::Spec::Structure.
.SS "new"
.IX Subsection "new"
Create a new MARC::Spec::Subfield instance.
.SS "add_subspec(MARC::Spec::Subspec)"
.IX Subsection "add_subspec(MARC::Spec::Subspec)"
Appends a subspec to the array of the attribute subspecs. Parameter must be an instance of 
MARC::Spec::Subspec.
.PP
Inherited from MARC::Spec::Structure.
.SS "add_subspecs(ArrayRef[MARC::Spec::Subspec])"
.IX Subsection "add_subspecs(ArrayRef[MARC::Spec::Subspec])"
Appends subspecs to the array of the attribute subspecs. Parameter must be an ArrayRef and 
elements must be instances of MARC::Spec::Subspec.
.PP
Inherited from MARC::Spec::Structure.
.SS "to_string"
.IX Subsection "to_string"
Returns the spec as a string.
.PP
Inherited from MARC::Spec::Structure.
.SH "PREDICATES"
.IX Header "PREDICATES"
Some predicates are inherited from MARC::Spec::Structure.
.SS "has_char_start"
.IX Subsection "has_char_start"
True if attribute char_start has an value and false otherwise.
.SS "has_char_end"
.IX Subsection "has_char_end"
True if attribute char_end has an value and false otherwise.
.SS "has_char_pos"
.IX Subsection "has_char_pos"
True if attribute char_pos has an value and false otherwise.
.SS "has_subspecs"
.IX Subsection "has_subspecs"
Returns true if attribute subspecs has an value and false otherwise.
.SH "ATTRIBUTES"
.IX Header "ATTRIBUTES"
Some attributes are inherited from MARC::Spec::Structure.
.SS "base"
.IX Subsection "base"
Obligatory. The base Subfield spec without subspecs.
.SS "code"
.IX Subsection "code"
Obligatory. The subfield code.
.SS "char_pos"
.IX Subsection "char_pos"
If defined, the character position or range. Only present if MARC::Spec::Subfield::$char_start is defined.
.SS "char_start"
.IX Subsection "char_start"
If defined, the beginning character position of a character position or range.
.SS "char_end"
.IX Subsection "char_end"
If defined, the ending character position of a character position or range.
Only present if MARC::Spec::Subfield::$char_start is defined.
.SS "char_length"
.IX Subsection "char_length"
The difference of MARC::Spec::Subfield::$char_start and MARC::Spec::Field::$char_end if both are numeric
(or else \-1).
Only present if MARC::Spec::Subfield::$char_start is defined.
.SS "index_start"
.IX Subsection "index_start"
Obligatory. The beginning index of subfield repetitions. Maybe a positiv integer or the character '#'.
Default is 0.
.SS "index_end"
.IX Subsection "index_end"
Obligatory. The ending index of subfield repetitions. Maybe a positiv integer or the character '#'.
Default is '#'.
.SS "index_length"
.IX Subsection "index_length"
Obligatory. The difference of MARC::Spec::Subfield::$index_start and MARC::Spec::Subfield::$index_end if both are numeric.
Default is \-1.
.SS "subspecs"
.IX Subsection "subspecs"
Optional an array of instances of MARC::Spec::Subspec, thus all subspecs in this 
array \s-1MUST\s0 be validated as a combination with the boolean '\s-1AND\s0',
and/or an array of arrays (AoA) of instances of MARC::Spec::Subspec, thus all subspecs 
in this AoA must be validated as a combination with the boolean '\s-1OR\s0'.
.PP
See MARC::Spec::Subspec for description of attributes of MARC::Spec::Subspec.
.SH "AUTHOR"
.IX Header "AUTHOR"
Carsten Klee \f(CW\*(C`<klee at cpan.org>\*(C'\fR
.SH "CONTRIBUTORS"
.IX Header "CONTRIBUTORS"
.IP "\(bu" 4
Johann Rolschewski, \f(CW\*(C`<jorol at cpan>\*(C'\fR
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
This software is copyright (c) 2016 by Carsten Klee.
.PP
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
.SH "BUGS"
.IX Header "BUGS"
Please report any bugs to <https://github.com/MARCspec/MARC\-Spec/issues>
.SH "SEE ALSO"
.IX Header "SEE ALSO"
.IP "\(bu" 4
MARC::Spec
.IP "\(bu" 4
MARC::Spec::Field
.IP "\(bu" 4
MARC::Spec::Indicator
.IP "\(bu" 4
MARC::Spec::Subspec
.IP "\(bu" 4
MARC::Spec::Structure
.IP "\(bu" 4
MARC::Spec::Comparisonstring
.IP "\(bu" 4
MARC::Spec::Parser