There are two main short commings to the current relational index implementation.

1. What if the user wants to include the current transcript in his searches? The relational index is only created for updated when the Virtual Classroom exits so the current transcript is unsearchable
2. What is the user wants to search for words that aren't inlcuded in the relational index? Only words specified in "keywords.txt" are added when the relational index is updated or created. It is not possible to change "keywords.txt" and have saved transcripts readded to the relational index.