IDOL Community Component 23.2

# BitFieldType Fields

If you have documents that can be part of several different document sets, you can use `BitFieldType` fields to efficiently store information on which sets the documents belong to.

The value in a `BitFieldType` field is a hexadecimal number, which in turn represents a binary number. The binary number is a representation of the sets that a document belongs to, with each binary digit representing a particular set of documents. If a document is part of a set, the bit corresponding to that set is a `1`. If a document is not part of that set, the bit is a `0`.

For example, if a document is present in sets 0, 5, 9, 11, 12, and 13, it has the following binary representation:

    11101000100001

where the digit at the furthest right position represents set 0, the digit to the left of set `0` represents set `1` and so on. Set numbers increase from right to left.

This number is the binary representation of the decimal number 14881, and the hexadecimal number `3A21`. Therefore, the `BitField` contains the value `3A21` to indicate that the document is part of these sets:

    #DREFIELD BitField="003A21"

In this way, information on sets can be stored in a single field per document, for an arbitrarily large number of sets.

To set up BitFieldType fields

1. Open the IDOL Content component configuration file in a text editor.

2. List a Bit Field process in the `[FieldProcessing]` section. For example:

       [FieldProcessing]
       0=MyFirstProcess
       1=BitFields

3. Create a section for each process that you listed, and in each section, create a property for the process (you define the property later by setting one or more applicable configuration parameters). Identify the fields that you want to associate with the process.

   NOTE: The properties that you create must not have the same name as the processes.

   For example:

       [MyFirstProcess]
       Property=MyProperty
       PropertyFieldCSVs=*/MyField,*/MyOtherField

       [BitFields]
       Property=BitFieldSetFields
       PropertyFieldCSVs=*/WORKBOORK,*/BITFIELD

4. Create a section for the property in which you set the `BitFieldType` parameter to `True`. This enables Content to store the contents of the `PropertyFieldCSVs` fields as bit fields. For example:

       [BitFieldSetFields]
       BitFieldType=True

5. To compress the BitField index, set `BitFieldCompressed` to `True` in the property section. For example:

       [BitFieldSetFields]
       BitFieldType=True
       BitFieldCompressed=True

6. Set the `BitFieldMaxMemoryKB` parameter to the maximum memory (in KB) that can be used by `BitFieldType` fields. If this is zero (the default) there is no limit to the memory.

       [BitFieldSetFields]
       BitFieldType=True
       BitFieldMaxMemoryKB=True

7. If you want to define `BitFieldType` fields or add extra `BitFieldType` fields, but have already indexed content into Content, you can set `RegenerateBitFieldIndex` to `True` in the `[Server]` section. This allows Content to generate the files it requires to internally identify `BitFieldType` fields on startup, so that you need only to restart Content to able to use `BitFieldType` fields, rather than having to reindex all your data.

       [Server]
       (...)
       RegenerateBitFieldIndex=True

   You can also use the `DREREGENERATE` index action to regenerate the `BitFieldType` index while the server is running.

8. Save and close the configuration file.

9. Restart the IDOL Content component for your changes to take effect.

NOTE: Each document that you store in Content must contain only one instance of any particular `BitFieldType` field.

Copyright 2023 Open Text
Version 23.2 | Last updated March 2023

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 swpdl.idoldocsfeedback@microfocus.com.

We appreciate your feedback!

Product: IDOL IDOL Community Component 23.2

Topic Title: BitFieldType Fields