Yewno opens with a main mapping area on the right, and a smaller sidebar on the left. Type a term into the search window in the sidebar, and it will return a list of related concepts.

Click on any one of the concepts that appear below the search bar, and it will appear as a central node in the graph (or concept map) on the right, with related concepts represented as other nodes surrounding it. The related concepts are connected to the central concept with lines representing their relationship, or what they have in common, with the central concept. The index of concepts and relationships is based on automated semantic analysis of the text of over 120,000,000 documents.

The sidebar will now display the concept you have selected, with links labeled “Overview,” “Concepts,” and “Documents.” “Overview” shows a quick description or definition of the concept, “Concepts” displays related concepts as a list with pictures and text snippets, and “Documents” displays a list of documents related to the selected concept, each item displaying title, publisher, year of publication, and a text snippet.

You may also generate a concept map based on your search term alone, using a link at the bottom of the concept list. However this is often less rich that one based on a selection from the list.

Select any concept displayed on the map to inspect it. The sidebar will now display that concept, with the same options (“Overview,” “Concepts,” and “Documents”) as before. The graph will change to show other concepts as nodes related to your newly-selected concept.