Meta Info Extractor

Extracts the meta information key, value pairs of documents. It can be specified whether the documents are appended or not and if duplicate documents in the input table are ignored and meta information is extracted only for distinct documents. Furthermore keys can be specified for which the key value pairs are extracted. Since there may be several key, value pair for each document original row ids can not be kept. For each key, value pair of a document a row in the output table exists. The output table contains at least two columns, one with the keys and another with the values. A third column containing the documents itself is appended if specified in the dialog. Documents that are missing or that do not contain selected keys, or any keys at all will be omitted.

Options

Document column

The document column to use.

Append documents

If checked a column containing the documents is appended.

For distinct documents only

If checked duplicate documents are ignored.

Extract only meta info for specified keys

If checked only meta infos for specified keys are extracted. Otherwise all key value pairs will be extracted.

Meta info keys (comma separated)

The keys of the meta infos to extract. Multiple keys must be comma separated.

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