| Question
7:
How can I include phrases in my RefViz analysis?
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| Answer: The RefViz Thesaurus tool provides a way to define equivalent terms for the same concept (for example, “cows” and “cattle”) or to reconcile alternative spellings such as “colour” and “color”. A default thesaurus provided with the software is predominantly a set of variations on the same word (such as “bead”, “beaded”, “beading”, and “beads”) and can be viewed with the Thesaurus tool available from the Tools menu. Adding new synonym sets and phrases is one way the user can bring topic expertise to an analysis.
To add a phrase to the vocabulary with the Thesaurus tool:
- Choose Thesaurus from the Tools menu.
- Type the phrase in the Term text box.
- Click Look-up/Create. The Thesaurus tool returns the message, "The word or phrase "actual_phrase" was not found."
- Click OK to dismiss the message.
- Click Save Entry. The phrase is added and highlighted in the Preview section.
- Once thesaurus changes are complete, click on Reprocess in the Thesaurus tool to include these changes in a new analysis.
 Since RefViz understands which words tend to occur together in the reference set changes to the default thesaurus may have less of an effect on the cluster analysis than you might expect. Even when there is a visible effect on the overall appearance of the Galaxy, the group membership and basic relationships are largely preserved. Creating phrases and synonyms will, however, make the terms in the Keyword Tool and in the Matrix visualization more intuitive.
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