KMR Stitch

I am brand new to reading tabs.

What does this 0h1 mean open fret hold fret 1?

e --------------------------------------------------------------------------
B ----1-----1-----1----1-----0h1---1----3---1---0--------3---1---0----------
G ------2-----2----------0-------0--------0---0---0--------0---0---0--------
D --3-----3-----3----2-----2------------------------0----------------0------
A --------------------------------------------------------------------------
E ------------------------------------3----------------3--------------------