Added control for empty tags and repeated tags
Added control for empty tags and repeated tags

c2lab/c2lab-front,c2lab/c2lab-front,c2lab/c2lab-front,c2lab/c2lab-front,c2lab/c2lab-front,c2lab/c2lab-front,c2lab/c2lab-front,c2lab/c2lab-front,c2lab/c2lab-front,c2lab/c2lab-front,c2lab/c2lab-front,c2lab/c2lab-front,c2lab/c2lab-front,c2lab/c2lab-front,c2lab/c2lab-front,c2lab/c2lab-front,c2lab/c2lab-front,c2lab/c2lab-front,c2lab/c2lab-front