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diff --git a/lib/Data/MultiValued/Ranges.pm b/lib/Data/MultiValued/Ranges.pm
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+package Data::MultiValued::Ranges;
+use Moose;
+use MooseX::Params::Validate;
+use Moose::Util::TypeConstraints;
+use MooseX::Types::Moose qw(Num Str Undef Any);
+use Data::MultiValued::Exceptions;
+use Data::MultiValued::RangeContainer;
+
+# ABSTRACT: Handle values with validity ranges
+
+=head1 SYNOPSIS
+
+  use Data::MultiValued::Ranges;
+
+  my $obj = Data::MultiValued::Ranges->new();
+  $obj->set({
+    from => 10,
+    to => 20,
+    value => 'foo',
+  });
+  say $obj->get({at => 15}); # prints 'foo'
+  say $obj->get({at => 35}); # dies
+
+=head1 METHODS
+
+=cut
+
+has _storage => (
+    is => 'rw',
+    isa => class_type('Data::MultiValued::RangeContainer'),
+    init_arg => undef,
+    lazy_build => 1,
+);
+
+sub _build__storage {
+    Data::MultiValued::RangeContainer->new();
+}
+
+=head2 C<set>
+
+  $obj->set({ from => $min, to => $max, value => $the_value });
+
+Stores the given value for the given range. Throws
+L<Data::MultiValued::Exceptions::BadRange|Data::MultiValued::Exceptions/Data::MultiValued::Exceptions::BadRange>
+if C<< $min > $max >>.
+
+The range is defined as C<< Num $x : $min <= $x < $max >>. A C<< from
+=> undef >> means "from -Inf", and a C<< to => undef >> means "to
++Inf". Not passing in C<from> or C<to> is equivalent to passing
+C<undef>.
+
+If the given range intersects existing ranges, these are spliced to
+avoid overlaps. In other words:
+
+  $obj->set({
+    from => 10,
+    to => 20,
+    value => 'foo',
+  });
+  $obj->set({
+    from => 15,
+    to => 25,
+    value => 'bar',
+  });
+  say $obj->get({at => 12}); # prints 'foo'
+  say $obj->get({at => 15}); # prints 'bar'
+  say $obj->get({at => 25}); # dies
+
+No cloning is done: if you pass in a reference, the reference is
+just stored.
+
+=cut
+
+sub set {
+    my ($self,%args) = validated_hash(
+        \@_,
+        from => { isa => Num|Undef, optional => 1, },
+        to => { isa => Num|Undef, optional => 1, },
+        value => { isa => Any, },
+    );
+
+    $self->_storage->get_or_create(\%args)
+         ->{value} = $args{value};
+}
+
+=head2 C<get>
+
+  my $value = $obj->get({ at => $point });
+
+Retrieves the value for the given point. Throws a
+L<Data::MultiValued::Exceptions::RangeNotFound|Data::MultiValued::Exceptions/Data::MultiValued::Exceptions::RangeNotFound>
+exception if no ranges exist in this object that include the point
+(remember that a range does not include its C<to> point).
+
+A C<< at => undef >> means "at -Inf". Not passing in C<at> is
+equivalent to passing C<undef>.
+
+No cloning is done: if a reference was stored, you get it back
+untouched.
+
+=cut
+
+sub get {
+    my ($self,%args) = validated_hash(
+        \@_,
+        at => { isa => Num|Undef, optional => 1, },
+    );
+
+    $self->_storage->get(\%args)
+         ->{value};
+}
+
+=head2 C<clear>
+
+  $obj->clear({ from => $min, to => $max });
+
+Deletes all values for the given range. Throws
+L<Data::MultiValued::Exceptions::BadRange|Data::MultiValued::Exceptions/Data::MultiValued::Exceptions::BadRange>
+if C<< $min > $max >>.
+
+A C<< from => undef >> means "from -Inf", and a C<< to => undef >>
+means "to +Inf". Not passing in C<from> or C<to> is equivalent to
+passing C<undef>. Thus, C<< $obj->clear() >> clears everything.
+
+If the given range intersects existing ranges, these are spliced. In
+other words:
+
+  $obj->set({
+    from => 10,
+    to => 20,
+    value => 'foo',
+  });
+  $obj->clear({
+    from => 15,
+    to => 25,
+  });
+  say $obj->get({at => 12}); # prints 'foo'
+  say $obj->get({at => 15}); # dies
+
+=cut
+
+sub clear {
+    my ($self,%args) = validated_hash(
+        \@_,
+        from => { isa => Num|Undef, optional => 1, },
+        to => { isa => Num|Undef, optional => 1, },
+    );
+
+    $self->_storage->clear(\%args);
+}
+
+=head1 Serialisation helpers
+
+These are used through
+L<Data::MultiValued::UglySerializationHelperRole>.
+
+=head2 C<_rebless_storage>
+
+Blesses the storage into L<Data::MultiValued::RangeContainer>.
+
+=cut
+
+sub _rebless_storage {
+    my ($self) = @_;
+
+    bless $self->{_storage},'Data::MultiValued::RangeContainer';
+}
+
+
+=head2 C<_as_hash>
+
+Returns the internal representation with no blessed hashes, with as
+few copies as possible.
+
+=cut
+
+sub _as_hash {
+    my ($self) = @_;
+
+    my %ret = %{$self->_storage};
+    return {_storage=>\%ret};
+}
+
+=head1 SEE ALSO
+
+L<Data::MultiValued::RangeContainer>, L<Data::MultiValued::Exceptions>
+
+=cut
+
+1;