To convert a bond line formula to a Haworth projection, it is essential to accurately represent the orientation of substituents on the ring structure. In this process, the type of bond connected to the hydroxyl (OH) groups plays a crucial role. A dashed bond indicates that the substituent points downwards, while a wedged bond signifies that it points upwards.

For instance, if a hydroxyl group is connected via a dashed bond, it should be depicted in the Haworth projection as pointing down from the corresponding carbon atom. Conversely, if the bond is wedged, the hydroxyl group will be shown pointing up. This distinction is vital for accurately illustrating the three-dimensional conformation of the molecule.

In summary, when converting to a Haworth projection, ensure that the orientation of the OH groups reflects the original bond types: dashed bonds for downward orientation and wedged bonds for upward orientation. This method provides a clear representation of the molecule's stereochemistry.