Reversible data transforms

A non-transitory computer-readable storage medium having computer-executable instructions stored thereon that are executable by a processor device to perform or control performance of operations comprising:

• receiving input effective to select a visualization type of a plurality of different visualization types to apply to a visualization of data, wherein:
• the selected visualization type is associated with a contract;
• each of the plurality of different visualization types is associated with a specific contract of a plurality of contracts;
• and
• each corresponding contract includes a corresponding schema that specifies a set of data fields and one or more relationships between the data fields in the set to generate and display a corresponding visualization having a corresponding visualization type;
• mapping at least some data of a data source to the contract such that the contract is satisfied, including applying one or more transforms to the at least some of the data of the data source to generate one or more intermediate data structures without modifying the at least some of the data of the data source;
• and
• displaying the visualization of the at least some data of the data source based on the contract, the displayed visualization having the selected visualization type.

A method to generate a visualization of data from a data source based on a contract, the method comprising:

• mapping at least some data of a data source to a contract such that the contract is satisfied, including:
• applying a first reversible transform to at least some of the data of the data source to generate a first intermediate data structure without modifying the at least some of the data of the data source;
• and
• applying a second reversible transform to the first intermediate data structure to generate a second intermediate data structure without modifying the at least some of the data of the data source, wherein at least one of the first and second intermediate data structures is in a format suitable to satisfy the contract;
• and
• displaying a visualization of the at least some data of the data source based on the contract, the displayed visualization having a visualization type specified by the contract.