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.\" ========================================================================
.\"
.IX Title "Data::YAML 3"
.TH Data::YAML 3 "2009-03-08" "perl v5.10.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Data::YAML \- Easy YAML serialisation of Perl data structures
.SH "VERSION"
.IX Header "VERSION"
This document describes Data::YAML version 0.0.6
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
In the spirit of YAML::Tiny, Data::YAML::Reader and
Data::YAML::Writer provide lightweight, dependency-free \s-1YAML\s0
handling. While \f(CW\*(C`YAML::Tiny\*(C'\fR is designed principally for working with
configuration files \f(CW\*(C`Data::YAML\*(C'\fR concentrates on the transparent round\-
tripping of \s-1YAML\s0 serialized Perl data structures.
.PP
As an example of why this distinction matters consider that
\&\f(CW\*(C`YAML::Tiny\*(C'\fR doesn't handle hashes with keys containing non-printable
characters. This is fine for configuration files but likely to cause
problems when handling arbitrary Perl data structures. \f(CW\*(C`Data::YAML\*(C'\fR
handles exotic hash keys correctly.
.PP
The syntax accepted by \f(CW\*(C`Data::YAML\*(C'\fR is a subset of \s-1YAML\s0. Specifically
it is the same subset of \s-1YAML\s0 that Data::YAML::Writer produces. See
Data::YAML for more information.
.SS "\s-1YAML\s0 syntax"
.IX Subsection "YAML syntax"
Although \s-1YAML\s0 appears to be a simple language the entire \s-1YAML\s0
specification is huge. \f(CW\*(C`Data::YAML\*(C'\fR implements a small subset of the
complete syntax trading completeness for compactness and simplicity.
This restricted syntax is known (to me at least) as 'YAMLish'.
.PP
These examples demonstrates the full range of supported syntax.
.PP
All \s-1YAML\s0 documents must begin with '\-\-\-' and end with a line
containing '...'.
.PP
.Vb 2
\& \-\-\- Simple scalar
\& ...
.Ve
.PP
Unprintable characters are represented using standard escapes in double
quoted strings.
.PP
.Vb 2
\& \-\-\- "\et\ex01\ex02\en"
\& ...
.Ve
.PP
Array and hashes are represented thusly
.PP
.Vb 6
\& \-\-\-
\& \- "This"
\& \- "is"
\& \- "an"
\& \- "array"
\& ...
\&
\& \-\-\-
\& This: is
\& a: hash
\& ...
.Ve
.PP
Structures may nest arbitrarily
.PP
.Vb 8
\& \-\-\-
\& \-
\& name: \*(AqHash one\*(Aq
\& value: 1
\& \-
\& name: \*(AqHash two\*(Aq
\& value: 2
\& ...
.Ve
.PP
Undef is a tilde
.PP
.Vb 2
\& \-\-\- ~
\& ...
.Ve
.SS "Uses"
.IX Subsection "Uses"
Use \f(CW\*(C`Data::YAML\*(C'\fR may be used any time you need to freeze and thaw Perl
data structures into a human readable format. The output from
\&\f(CW\*(C`Data::YAML::Writer\*(C'\fR should be readable by any \s-1YAML\s0 parser.
.PP
\&\f(CW\*(C`Data::YAML\*(C'\fR was originally written to allow machine-readable
diagnostic information to be passed from test scripts to
TAP::Harness. That means that if you're writing a testing system that
needs to output \s-1TAP\s0 version 13 or later syntax you might find
\&\f(CW\*(C`Data::YAML\*(C'\fR useful.
.PP
Read more about \s-1TAP\s0 and YAMLish here: <http://testanything.org/wiki>
.SH "BUGS AND LIMITATIONS"
.IX Header "BUGS AND LIMITATIONS"
No bugs have been reported.
.PP
Please report any bugs or feature requests to
\&\f(CW\*(C`data\-yaml@rt.cpan.org\*(C'\fR, or through the web interface at
<http://rt.cpan.org>.
.SH "AUTHOR"
.IX Header "AUTHOR"
Andy Armstrong \f(CW\*(C`<andy@hexten.net>\*(C'\fR
.SH "LICENCE AND COPYRIGHT"
.IX Header "LICENCE AND COPYRIGHT"
Copyright (c) 2007, Andy Armstrong \f(CW\*(C`<andy@hexten.net>\*(C'\fR. All rights reserved.
.PP
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself. See perlartistic.
.SH "DISCLAIMER OF WARRANTY"
.IX Header "DISCLAIMER OF WARRANTY"
\&\s-1BECAUSE\s0 \s-1THIS\s0 \s-1SOFTWARE\s0 \s-1IS\s0 \s-1LICENSED\s0 \s-1FREE\s0 \s-1OF\s0 \s-1CHARGE\s0, \s-1THERE\s0 \s-1IS\s0 \s-1NO\s0 \s-1WARRANTY\s0
\&\s-1FOR\s0 \s-1THE\s0 \s-1SOFTWARE\s0, \s-1TO\s0 \s-1THE\s0 \s-1EXTENT\s0 \s-1PERMITTED\s0 \s-1BY\s0 \s-1APPLICABLE\s0 \s-1LAW\s0. \s-1EXCEPT\s0 \s-1WHEN\s0
\&\s-1OTHERWISE\s0 \s-1STATED\s0 \s-1IN\s0 \s-1WRITING\s0 \s-1THE\s0 \s-1COPYRIGHT\s0 \s-1HOLDERS\s0 \s-1AND/OR\s0 \s-1OTHER\s0 \s-1PARTIES\s0
\&\s-1PROVIDE\s0 \s-1THE\s0 \s-1SOFTWARE\s0 \*(L"\s-1AS\s0 \s-1IS\s0\*(R" \s-1WITHOUT\s0 \s-1WARRANTY\s0 \s-1OF\s0 \s-1ANY\s0 \s-1KIND\s0, \s-1EITHER\s0
\&\s-1EXPRESSED\s0 \s-1OR\s0 \s-1IMPLIED\s0, \s-1INCLUDING\s0, \s-1BUT\s0 \s-1NOT\s0 \s-1LIMITED\s0 \s-1TO\s0, \s-1THE\s0 \s-1IMPLIED\s0
\&\s-1WARRANTIES\s0 \s-1OF\s0 \s-1MERCHANTABILITY\s0 \s-1AND\s0 \s-1FITNESS\s0 \s-1FOR\s0 A \s-1PARTICULAR\s0 \s-1PURPOSE\s0. \s-1THE\s0
\&\s-1ENTIRE\s0 \s-1RISK\s0 \s-1AS\s0 \s-1TO\s0 \s-1THE\s0 \s-1QUALITY\s0 \s-1AND\s0 \s-1PERFORMANCE\s0 \s-1OF\s0 \s-1THE\s0 \s-1SOFTWARE\s0 \s-1IS\s0 \s-1WITH\s0
\&\s-1YOU\s0. \s-1SHOULD\s0 \s-1THE\s0 \s-1SOFTWARE\s0 \s-1PROVE\s0 \s-1DEFECTIVE\s0, \s-1YOU\s0 \s-1ASSUME\s0 \s-1THE\s0 \s-1COST\s0 \s-1OF\s0 \s-1ALL\s0
\&\s-1NECESSARY\s0 \s-1SERVICING\s0, \s-1REPAIR\s0, \s-1OR\s0 \s-1CORRECTION\s0.
.PP
\&\s-1IN\s0 \s-1NO\s0 \s-1EVENT\s0 \s-1UNLESS\s0 \s-1REQUIRED\s0 \s-1BY\s0 \s-1APPLICABLE\s0 \s-1LAW\s0 \s-1OR\s0 \s-1AGREED\s0 \s-1TO\s0 \s-1IN\s0 \s-1WRITING\s0
\&\s-1WILL\s0 \s-1ANY\s0 \s-1COPYRIGHT\s0 \s-1HOLDER\s0, \s-1OR\s0 \s-1ANY\s0 \s-1OTHER\s0 \s-1PARTY\s0 \s-1WHO\s0 \s-1MAY\s0 \s-1MODIFY\s0 \s-1AND/OR\s0
\&\s-1REDISTRIBUTE\s0 \s-1THE\s0 \s-1SOFTWARE\s0 \s-1AS\s0 \s-1PERMITTED\s0 \s-1BY\s0 \s-1THE\s0 \s-1ABOVE\s0 \s-1LICENCE\s0, \s-1BE\s0
\&\s-1LIABLE\s0 \s-1TO\s0 \s-1YOU\s0 \s-1FOR\s0 \s-1DAMAGES\s0, \s-1INCLUDING\s0 \s-1ANY\s0 \s-1GENERAL\s0, \s-1SPECIAL\s0, \s-1INCIDENTAL\s0,
\&\s-1OR\s0 \s-1CONSEQUENTIAL\s0 \s-1DAMAGES\s0 \s-1ARISING\s0 \s-1OUT\s0 \s-1OF\s0 \s-1THE\s0 \s-1USE\s0 \s-1OR\s0 \s-1INABILITY\s0 \s-1TO\s0 \s-1USE\s0
\&\s-1THE\s0 \s-1SOFTWARE\s0 (\s-1INCLUDING\s0 \s-1BUT\s0 \s-1NOT\s0 \s-1LIMITED\s0 \s-1TO\s0 \s-1LOSS\s0 \s-1OF\s0 \s-1DATA\s0 \s-1OR\s0 \s-1DATA\s0 \s-1BEING\s0
\&\s-1RENDERED\s0 \s-1INACCURATE\s0 \s-1OR\s0 \s-1LOSSES\s0 \s-1SUSTAINED\s0 \s-1BY\s0 \s-1YOU\s0 \s-1OR\s0 \s-1THIRD\s0 \s-1PARTIES\s0 \s-1OR\s0 A
\&\s-1FAILURE\s0 \s-1OF\s0 \s-1THE\s0 \s-1SOFTWARE\s0 \s-1TO\s0 \s-1OPERATE\s0 \s-1WITH\s0 \s-1ANY\s0 \s-1OTHER\s0 \s-1SOFTWARE\s0), \s-1EVEN\s0 \s-1IF\s0
\&\s-1SUCH\s0 \s-1HOLDER\s0 \s-1OR\s0 \s-1OTHER\s0 \s-1PARTY\s0 \s-1HAS\s0 \s-1BEEN\s0 \s-1ADVISED\s0 \s-1OF\s0 \s-1THE\s0 \s-1POSSIBILITY\s0 \s-1OF\s0
\&\s-1SUCH\s0 \s-1DAMAGES\s0.
|
