1. A computer-implemented method of shared business modeling involving spreadsheet-based business models in a network of computers, comprising: maintaining a set of tags in at least one storage device in the network, at least some of the tags in the set comprising metric dimension tags and others of the tags in the set comprising entity dimension tags, the metric dimension tags and entity dimension tags being assignable by a user to data entries in a user's spreadsheet to create rules associating data in cells of the spreadsheet each with at least one metric dimension tag and one entity dimension tag; receiving, from the user, a specific association of a particular spreadsheet with an entity within the network having an entity identifier, the particular spreadsheet including at least one rule comprising at least one uniquely named table associating data values from among specific cells within the particular spreadsheet such that the specific cells will each be tagged with at least both a specific entity dimension tag and a specific metric dimension tag; extracting, using a computer in the network, spreadsheet data values from the tagged cells and their associated metric dimension tags and entity dimension tags from the spreadsheet; storing each of the extracted spreadsheet data values in combination with their respective metric dimension tag and entity dimension tag, in a shared network-accessible storage; receiving an indication that a tagged data value in the spreadsheet has been altered such that it is a changed data value; and transferring the changed data value from the spreadsheet to the shared network-accessible storage containing the spreadsheet data values and replacing the tagged data value with the changed data value in the shared network-accessible storage.
1. A computer-implemented method of shared business modeling involving spreadsheet-based business models in a network of computers, comprising: maintaining a set of tags in at least one storage device in the network, at least some of the tags in the set comprising metric dimension tags and others of the tags in the set comprising entity dimension tags, the metric dimension tags and entity dimension tags being assignable by a user to data entries in a user's spreadsheet to create rules associating data in cells of the spreadsheet each with at least one metric dimension tag and one entity dimension tag; receiving, from the user, a specific association of a particular spreadsheet with an entity within the network having an entity identifier, the particular spreadsheet including at least one rule comprising at least one uniquely named table associating data values from among specific cells within the particular spreadsheet such that the specific cells will each be tagged with at least both a specific entity dimension tag and a specific metric dimension tag; extracting, using a computer in the network, spreadsheet data values from the tagged cells and their associated metric dimension tags and entity dimension tags from the spreadsheet; storing each of the extracted spreadsheet data values in combination with their respective metric dimension tag and entity dimension tag, in a shared network-accessible storage; receiving an indication that a tagged data value in the spreadsheet has been altered such that it is a changed data value; and transferring the changed data value from the spreadsheet to the shared network-accessible storage containing the spreadsheet data values and replacing the tagged data value with the changed data value in the shared network-accessible storage. 4. The method of claim 1 , further comprising displaying a graphical interface to the user to facilitate creation of the rule.