Traditionally, collaborative systems have been difficult to conceive, design and implement. Although several requirements involved in these products are recurrent, some become invisible to clients and developers because they are part of the product back-end. This situation is worse in the case of mobile groupware because the general requirements to support mobile collaboration are still unclear. This paper presents a framework of general requirements that are usually present in mobile shared workspaces. These requirements are not always visible; therefore the framework acts as a checklist helping developers to consider them. Thus, the framework could increase the success probability of mobile shared workspaces.