CreateSemanticSearchIndex
CreateSemanticSearchIndex[source] creates a search index from the data in source.
CreateSemanticSearchIndex[{source1,…}] creates a search index with a collection of sources sourcei.
CreateSemanticSearchIndex[{source1->val1,…}] associates the source sourcei to the value vali.
CreateSemanticSearchIndex[data,"name"] gives the search index the specified name.
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