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<h4>convertStringAttsToNominal</h4>
<pre>public&nbsp;void&nbsp;convertStringAttsToNominal()</pre>
<div class="block">Method to convert any string attributes in the mining schema
 Instances to nominal attributes. This may be necessary if there are
 no Value elements defined for categorical fields in the data dictionary.
 In this case, elements in the actual model definition will probably reveal
 the valid 