Connector Framework Server 25.2
Connector Framework Server Help

# Extract Metadata from Files

The `ExtractMetadata` task extracts metadata from the file associated with a document. This task extracts a subset of the metadata obtained by standard File Content Extraction filtering. It is faster than standard File Content Extraction filtering and does not extract the file content.

TIP: When documents are ingested, CFS automatically extracts metadata. Do not use this task unless you have set the fields `AUTN_NO_FILTER` and `AUTN_NO_EXTRACT` on a document and want to extract basic metadata only.

The `ExtractMetadata` task is configured as a Pre task. Specify the name of the section that contains settings for the task. For example:

    [ExtractMetadata]
    Pre0=Lua:scripts/nofilter.lua
    Pre1=ExtractMetadata:ExtractMetadataSettings

    [ExtractMetadataSettings]
    FieldnamePrefix=FIELD_
    ReservedFieldnames=Reserved1,Reserved2

The `Pre0` task runs a Lua script that adds the fields `AUTN_NO_FILTER` and `AUTN_NO_EXTRACT` to documents. Adding these fields prevents File Content Extraction from filtering the documents and extracting subfiles.

The `Pre1` task runs the `ExtractMetadata` task using the settings contained in the `[ExtractMetadataSettings]` section of the CFS configuration file.

The `FieldnamePrefix` parameter specifies a prefix for the names of the metadata fields that are added to the document. The `ReservedFieldnames` parameter specifies a comma-separated list of field names that the task must not use. If the task needs to add a metadata field with one of the specified names, it prefixes the name with an underscore. For example, with the settings specified above, the task would not add a field named `FIELD_Reserved1`. Instead, the task would add `_FIELD_Reserved1`.

Copyright 2025 Open Text
Version 25.2 | Last updated April 2025

Send documentation feedback

Close

Send documentation feedback

To send feedback using your default email client, open an email window.

Otherwise, send your feedback and the information below to MFI-swpdl.idoldocsfeedback@opentext.com.

We appreciate your feedback!

Product: Knowledge Discovery Connector Framework Server 25.2

Topic Title: Extract Metadata from Files