1. A computer system for a unified search and navigation of heterogeneous data sources, the computer system comprising: one or more computer processors, one or more computer-readable storage media, and program instructions stored on one or more of the computer-readable storage media for execution by at least one of the one or more processors, the program instructions comprising: program instructions to receive a search keyword from a user interface; program instructions to search a plurality of heterogeneous data sources utilizing the search keyword, wherein the plurality of heterogeneous data sources include data in a variety of data formats, and wherein the program instructions form an abstract of the variety of data formats of the heterogeneous data sources and present the abstract of the variety of data formats in a uniform data format; program instructions to send a first data set, in the uniform data format, to the user interface, wherein the first data set comprises a search result from searching the heterogeneous data sources; program instructions to receive a first indicator from the user interface identifying a selected search result selected from the first data set; program instructions to send a second data set in the uniform data format to the user interface, wherein the second data set comprises a data sample, and wherein the data sample corresponds to the selected search result selected from the first data set; program instructions to receive a second indicator from the user interface identifying a selected data sample to save, wherein the selected data sample is selected from the second data set; program instructions to send a third data set to the user interface, wherein the third data set comprises a named representation of the selected data sample; program instructions to receive a plurality of third indicators from the user interface identifying a plurality of selected third data sets to combine; program instructions to send a fourth data set to the user interface in the uniform data format, wherein the fourth data set comprises a guided combination option for the plurality of selected third data sets; program instructions to receive a fourth indicator from the user interface identifying a selected guided combination option selected from the fourth data set to utilize in combining the plurality of selected third data sets; program instructions to send a fifth data set to the user interface in the uniform data format, wherein the fifth data set comprises a combination data sample from the plurality of selected third data sets utilizing the selected guided combination option selected from the fourth data set; program instructions to receive a fifth indicator from the user interface identifying a selected combination data sample to save, wherein the selected combination data sample is selected from the fifth data set; and program instructions to send a sixth data set to the user interface, wherein the sixth data set comprises a named representation of the selected combination data sample.