Laboratory Hydrate Data is one of the three constituent modules comprising the XML based Gas Hydrate Markup Language (a.k.a. GHML) schema, the others being Field Hydrate data by L&oumul;wner et al. and Hydrate Modeling by Wang et al. This module describes the characteristics of natural and synthetic gas hydrates as they pertain to data acquired via analysis within a laboratory environment. Such data include the preservation history (i.e.: technique, pressurization gas and pressure, etc), Macroscopic data (i.e.: water-sediment ratio, appearance, P-T behavior, etc) as well as that of the Microscopic realm.