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diff --git a/lib/Reaction/Types/Core.pm b/lib/Reaction/Types/Core.pm
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+package Reaction::Types::Core;
+
+use Moose::Util::TypeConstraints;
+
+subtype 'SimpleStr'
+  => as 'Str'
+  => where { (length($_) <= 255) && ($_ !~ m/\n/) }
+  => message { "Must be a single line of no more than 255 chars" };
+
+subtype 'NonEmptySimpleStr'
+  => as 'SimpleStr'
+  => where { length($_) > 0 }
+  => message { "Must be a non-empty single line of no more than 255 chars" };
+
+# XXX duplicating constraint msges since moose only uses last message
+
+subtype 'Password'
+  => as 'NonEmptySimpleStr'
+  => where { length($_) > 3 }
+  => message { "Must be between 4 and 255 chars" };
+
+subtype 'StrongPassword'
+  => as 'Password'
+  => where { (length($_) > 7) && (m/[^a-zA-Z]/) }
+  => message { "Must be between 8 and 255 chars, and contain a non-alpha char" };
+
+subtype 'NonEmptyStr'
+  => as 'Str'
+  => where { length($_) > 0 }
+  => message { "Must not be empty" };
+
+subtype 'PositiveNum'
+  => as 'Num'
+  => where { $_ >= 0 }
+  => message { "Must be a positive number" };
+
+subtype 'PositiveInt'
+  => as 'Int'
+  => where { $_ >= 0 }
+  => message { "Must be a positive integer" };
+
+subtype 'SingleDigit'
+  => as 'PositiveInt'
+  => where { $_ <= 9 }
+  => message { "Must be a single digit" };
+
+1;
+
+=head1 NAME
+
+Reaction::Types::Core
+
+=head1 SYNOPSIS
+
+=head1 DESCRIPTION
+
+Reaction uses the L<Moose> attributes as a base and adds a few of it's own.
+
+=over 
+
+=item * SimpleStr
+
+A Str with no new-line characters.
+
+=item * NonEmptySimpleStr
+
+Does what it says on the tin.
+
+=item * Password
+
+=item * StrongPassword
+
+=item * NonEmptyStr
+
+=item * PositiveNum
+
+=item * PositiveInt
+
+=item * SingleDigit
+
+=back
+
+=head1 SEE ALSO
+
+=over 
+
+=item * L<Moose::Util::TypeConstraints>
+
+=item * L<Reaction::Types::DBIC>
+
+=item * L<Reaction::Types::DateTime>
+
+=item * L<Reaction::Types::Email>
+
+=item * L<Reaction::Types::File>
+
+=back
+
+=head1 AUTHORS
+
+See L<Reaction::Class> for authors.
+
+=head1 LICENSE
+
+See L<Reaction::Class> for the license.
+
+=cut