diff --git a/lib/Bio/GenomeUpdate/TP.pm b/lib/Bio/GenomeUpdate/TP.pm
index e69de29..afed7ba 100644
--- a/lib/Bio/GenomeUpdate/TP.pm
+++ b/lib/Bio/GenomeUpdate/TP.pm
@@ -0,0 +1,181 @@
+package  Bio::GenomeUpdate::TP;
+use strict;
+use warnings;
+
+use Moose;
+use MooseX::FollowPBP;
+use Moose::Util::TypeConstraints;
+use Bio::GenomeUpdate::TP::TPLine;
+
+=head1 NAME
+
+    SP - Trim point information for NCBI GRC pipeline with instructions used to generate a Accessioned Golden Path (AGP) file
+
+=head1 SYNOPSIS
+
+    my $variable = SwitchPoint->new();
+
+=head1 DESCRIPTION
+
+This class stores information for transitions between TPF components including TPF type, taxonomy and assembly and generates a trim point (TP) file. The trim point file specifies the extent of a component to be used in the AGP file. 
+
+=head2 Methods
+
+=over 
+
+=item C<set_taxid ( $taxonomy_id )>
+
+Sets the taxonomy identifier for the SP file, e.g. 4081 for Solanum lycopersicum.
+
+=item C<get_taxid>
+
+Gets the taxonomy identifier for the SP file.
+
+=cut
+
+has 'tp_taxid' => (
+	isa     => 'Str',
+	is      => 'rw',
+	default => '4081',
+	required => 1,
+	clearer => 'clear_tp_taxid'
+);
+
+=item C<set_assembly_group ( $organism_string )>
+
+Sets the assembly_group (required).
+
+=item C<get_assembly_group>
+
+Gets the assembly_group.
+
+=cut
+
+has 'assembly_group' =>
+  ( isa => 'Str', is => 'rw', default => 'TGP', required => 1, clearer => 'clear_assembly_group' );
+
+=item C<set_assembly_unit ( $organism_string )>
+
+Sets the assembly_unit (required).
+
+=item C<get_assembly_unit>
+
+Gets the assembly_unit.
+
+=cut
+
+has 'assembly_unit' =>
+  ( isa => 'Str', is => 'rw', default => 'Primary', required => 1, clearer => 'clear_assembly_unit' );
+
+=item C<set_tpf_type ( $tpf_type )>
+
+Sets the TPF type. Valid values are chromosome and contig (latter used for unlocalized or unplaced scaffolds, required).
+
+=item C<get_tpf_type >
+
+Gets the TPF type.
+
+=cut
+
+subtype 'TPTPFType', as 'Str', where { $_ eq "chromosome" || $_ eq "contig" },
+  message { "The string, $_, was not a valid TPF type. See http://www.ncbi.nlm.nih.gov/projects/genome/assembly/grc/overlap/ specification link" };
+
+has 'tp_tpf_type' => ( isa => 'TPTPFType', is => 'rw', default => 'chromosome', required => 1, clearer => 'clear_chromosome' );
+
+subtype 'TPLine',
+  as 'Bio::GenomeUpdate::TP::TPLine',
+  message { "The object was not a TP line" };
+
+has 'tp_lines' => (
+	isa       => 'HashRef[TPLine]',
+	is        => 'rw',
+	predicate => 'has_tp_lines',
+	clearer   => 'clear_tp_lines'
+);
+
+=item C<add_line_to_end >
+
+Add a TPLine object.
+
+=cut
+
+sub add_line_to_end {
+	my $self        = shift;
+	my $line_to_add = shift;
+	my %lines;
+	if ( $self->has_tp_lines() ) {
+		%lines = %{ $self->get_tp_lines() };
+	}
+	my $last_line = $self->get_number_of_lines();
+	$lines{ $last_line + 1 } = $line_to_add;#key is just the index or line number
+	$self->set_tp_lines( {%lines} );
+}
+
+=item C<get_number_of_lines >
+
+Return number of lines in the TPLine object.
+
+=cut
+
+sub get_number_of_lines {
+	my $self = shift;
+	my %lines;
+	if ( $self->has_tp_lines() ) {
+		%lines = %{ $self->get_tp_lines() };
+		my @sorted_line_numbers = sort { $a <=> $b } keys %lines;
+		return $sorted_line_numbers[-1];
+	}
+	else {
+		return 0;
+	}
+}
+
+=item C<get_formatted_tp >
+
+Return string with all lines in the TPLine object.
+
+=cut
+
+sub get_formatted_tp {
+	my $self = shift;
+	my %lines;
+	my $out_str;
+
+	if ( $self->has_tp_lines() ) {
+		%lines = %{ $self->get_tp_lines() };
+		my @sorted_line_numbers = sort { $a <=> $b } keys %lines;
+		foreach my $line_key (@sorted_line_numbers) {
+			$out_str .= $self->get_tp_taxid() . "\t";
+			$out_str .= $self->get_assembly_group() . "\t";
+			$out_str .= $self->get_assembly_unit() . "\t";
+			$out_str .= $lines{$line_key}->get_chromosome() . "\t";
+			$out_str .= $self->get_tp_tpf_type() . "\t";
+			$out_str .= $lines{$line_key}->get_accession_prefix() . "\t";
+			$out_str .= $lines{$line_key}->get_accession_suffix() . "\t";
+			$out_str .= $lines{$line_key}->get_accession_prefix_orientation() . "\t";
+			$out_str .= $lines{$line_key}->get_accession_suffix_orientation() . "\t";
+			$out_str .= $lines{$line_key}->get_accession_prefix_last_base() . "\t";
+			$out_str .= $lines{$line_key}->get_accession_suffix_first_base() . "\t";
+			$out_str .= $lines{$line_key}->get_comment() . "\n";
+		}
+	}
+	return $out_str;
+}
+
+###
+1;    #do not remove
+###
+
+=pod
+
+=back
+
+=head1 LICENSE
+
+Same as Perl.
+
+=head1 AUTHORS
+
+  Surya Saha        <suryasaha@cornell.edu>
+
+=cut
diff --git a/lib/Bio/GenomeUpdate/TP/TPLine.pm b/lib/Bio/GenomeUpdate/TP/TPLine.pm
index e69de29..61f7781 100644
--- a/lib/Bio/GenomeUpdate/TP/TPLine.pm
+++ b/lib/Bio/GenomeUpdate/TP/TPLine.pm
@@ -0,0 +1,75 @@
+package  Bio::GenomeUpdate::TP::TPLine;
+use strict;
+use warnings;
+
+use Moose;
+use MooseX::FollowPBP;
+use Moose::Util::TypeConstraints;
+
+use Data::Dumper;#for debugging
+
+=head1 NAME
+
+    TP - Trim point lines for NCBI GRC pipeline with instructions used to generate a Accessioned Golden Path (AGP) file
+
+=head1 SYNOPSIS
+
+    my $variable = TPLine->new();
+
+=head1 DESCRIPTION
+
+This class stores information for transitions between TPF components including chromosome, accessions and coordinates for generating a trim point (TP) file. The trim point file specifies the extent of a component in the AGP file. 
+
+=head2 Methods
+
+=over 
+
+=cut
+
+=item C<set_chromosome ( $chromosome )>
+
+Sets the chromosome. Valid values for Solanum lycopersicum are 1-12 and Un (required).
+
+=item C<get_chromosome >
+
+Gets the chromosome.
+
+=cut
+
+subtype 'TPChromosome',
+  as 'Str',
+  where { ( $_ >= 1 && $_ <=12 ) || ( $_ eq "Un" )},#does NOT work. need to do -> if int check 1-12, if str check Un
+  message { "The string, $_, was not a valid chromosome number.  Valid values for Solanum lycopersicum are 1-12 and Un." };
+has 'chromosome' => ( isa => 'TPChromosome', is => 'rw', required => 1, clearer => 'clear_chromosome' );
+
+has 'accession' => ( isa => 'Str', is => 'rw', required => 1, clearer => 'clear_accession' );
+
+subtype 'PositiveInt',
+	as 'Int',
+	where { $_ > 0 },
+	message { "The string, $_, was not a positive coordinate" };
+has 'accession_prefix_first_or_last_base' => ( isa => 'PositiveInt', is => 'rw', required => 1, clearer => 'clear_accession_prefix_first_or_last_base' );
+
+subtype 'TPComment',
+  as 'Str',
+  where { (scalar $_) >= 25 },#does not work!!
+  message { "The string, $_, was shorter than the minimum length of 25 characters." };
+has 'comment' => ( isa => 'TPComment', is => 'rw', required => 1, clearer => 'clear_comment' );
+
+###
+1;    #do not remove
+###
+
+=pod
+
+=back
+
+=head1 LICENSE
+
+Same as Perl.
+
+=head1 AUTHORS
+
+  Surya Saha        <suryasaha@cornell.edu>
+
+=cut
\ No newline at end of file