public boolean isExtractIncrementalUpdateInfo() {
        return defaultConfig.isExtractIncrementalUpdateInfo();
    }
Whether or not to scan a PDF for incremental updates.
@param setExtractIncrementalUpdateInfo
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-pdf-module/src/main/java/org/apache/tika/parser/pdf/PDFParser.java