Responding to data requests related to constrained natural language vocabulary terms

A processor-implemented method of responding to data requests by a computer system, the processor-implemented method comprising:

• creating, by one or more processors, a constrained natural language (cNL) vocabulary dictionary, wherein the cNL vocabulary dictionary contains multiple cNL vocabulary terms;
• generating, by one or more processors, a data source table, wherein the data source table is specific for a particular constrained natural language (cNL) vocabulary term from a cNL vocabulary dictionary, wherein the cNL vocabulary dictionary contains multiple cNL vocabulary terms, wherein the data source table comprises location references to multiple predetermined data sources that contain data related to the particular cNL vocabulary term, wherein at least two of the multiple predetermined data sources are disparate types of data sources as compared to each other, wherein the data source table comprises location references to materialized views of data from each of the multiple data sources, wherein the data source table is populated with a materialized view refresh policy for each said materialized views of data from each of the multiple data sources, and wherein the materialized views of data are data that is related to the particular cNL vocabulary term;
• receiving, by one or more processors, a request for data related to the particular cNL vocabulary term from a requester;
• retrieving, by one or more processors, data from multiple materialized views from the data source table;
• returning, by one or more processors, data from the multiple materialized views from the data source table to the requester;
• detecting, by a sensor on a data source server that supports a data source, a physical condition of the data source server, wherein the physical condition comprises a change in altitude of a physical location of the data source server beyond a certain level, and a change in a geographic physical location of the data source server from a first geographic location to a second geographic location;
• and
• triggering, by one or more processors, a refresh of one or more materialized views of data by one or more materialized view refresh policies based on a change detected by the sensor in the data source server.