Hi there Christopher,
After you create a Data Source Connection to the Excel document, you should be able to use its contents like any other type of data source.
Managing External Data Source Connections
If you want to allow users to search this data, you should create an interface that collects one or more search values from the end user (typically with Free Text questions). Then, create a Filter that will limit the rows returned by the data source. Create as many conditions as you need, and link them to whichever values (for example, the dynamic values of your questions) you want to apply to the query.
Applying Filters to a Data Source
Most likely, you will want a visual representation of your filtered data, which you can create using a Data Source Grid.
Using Data Grids
A forthcoming build of the KnowledgeKube back office will feature full-text indexing for data sources, allowing you to surface the indexed data in a number of useful ways. Watch this space for more information!
Kind regards.