Exploration and navigation of a content collection

A computer program product, the computer program product comprising a computer readable storage medium having program code embodied therewith, the program code executable by at least one processor to perform:

• creating a first window and a second window within the user interface displayed on the electronic display;
• displaying a node graph visualization in the first window, wherein the node graph visualization comprises nodes representing individual content elements within the content, and wherein the nodes are clustered in proximity to each other according to topics associated with the individual content elements;
• displaying a text-based topic visualization in the second window, wherein the text-based topic visualization comprises text elements representing topics associated with the individual content elements within the content;
• receiving a selection of one or more text elements within the second window corresponding to one or more topics of interest;
• and
• highlighting and zooming in on a subset of nodes within the first window representing individual content elements associated with a union of the one or more text elements selected corresponding to the one or more topics of interest.

A computer system, comprising:

• one or more processors, one or more computer-readable memories and one or more computer-readable, tangible storage devices;
• and
• program instructions, stored on at least one of the one or more computer-readable, tangible storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to perform operations, wherein the operations comprise:
• creating a first window and a second window within the user interface displayed on the electronic display;
• displaying a node graph visualization in the first window, wherein the node graph visualization comprises nodes representing individual content elements within the content, and wherein the nodes are clustered in proximity to each other according to topics associated with the individual content elements;
• displaying a text-based topic visualization in the second window, wherein the text-based topic visualization comprises text elements representing topics associated with the individual content elements within the content;
• receiving a selection of one or more text elements within the second window corresponding to one or more topics of interest;
• and
• highlighting and zooming in on a subset of nodes within the first window representing individual content elements associated with a union of the one or more text elements selected corresponding to the one or more topics of interest.