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dtSearch Engine API for Java
TextFlags.dtsoTfSkipNumericValues Field

By default, dtSearch indexes numbers both as text and as numeric values, which is necessary for numeric range searching. Use this flag to suppress indexing of numeric values in applications that do not require numeric range searching. This setting can reduce the size of the index by about 20%.

Syntax
Java
public static final int dtsoTfSkipNumericValues = 0x0001;