1. A context locking system for locking context of a set of members in a crosstab for data exploration and analysis, the context locking system comprising: a lock request manager for receiving a request for locking context of a selected set of members in a crosstab which contains data retrieved from a data source; a context information manager for collecting context information of the selected member set; and a locking manager for locking the context of the selected set based on the context information during further exploration or analysis of the crosstab, while allowing changing of data based on data changes in the data source.