View Component 25.4
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# About Fields

Data passes to the Content component (for example, from Knowledge Discovery connectors) in the form of IDX or XML fields. Content stores all the fields that it receives so that you can search any field by using `FieldText` queries. To optimize Content performance, you can specify how it processes and stores the fields it receives.

You can associate fields with special properties in the Content component configuration file. For example, you can instruct Content to treat these fields (or documents that contain them) in a specific way or read specific information from them.

You can associate a field with more than one property, as long as the properties do not clash.

You can assign the following properties to fields.

`ACLType` | Fields that hold access control lists (ACLs).
`AlwaysMatchType` | Fields that queries always match when they are present with a non-empty value.
`AutnRankType` | Fields that hold the document rank.
`BitFieldCompressed` | The index for `BitFieldType` fields is compressed.
`BitFieldMaxMemoryKB` | The maximum memory (in KB) to allocate for each associated `PropertyFieldCSVs` field that has the `BitFieldType` property.
`BitFieldType` | Fields that hold information on document sets. See BitFieldType Fields.
`CountType` | The number of occurrences of the associated fields are stored in a fast look-up table in memory to optimize matching of the fields when you use the `MATCHCOVER` and `EQUALCOVER` `FieldText` specifiers.
`DatabaseType` | Fields that hold the database that documents belongs to.
`DateType` | Fields that hold the date of documents.
`ExpireAfterDelay` | An offset, in hours, to add to the expiration date in the associated `ExpireDateType` field.
`ExpireDateType` | Fields that hold the expiration dates of documents.
`FieldCheckType` | A field that occurs in a large number of documents and holds a value that is frequently used to restrict query results.
`FlattenIndexType` | Fields that originate from hierarchically structured documents and whose content is stored as one level.
`GeospatialType` | Fields that contain geospatial (location) information.
`HiddenType` | Fields whose content is hidden.
`HighlightType` | If fields contain terms that match a query, these terms are highlighted. See Highlight Fields.
`Index` | Fields that are stored as Index fields. See Index Fields.
`IndexNumbers` | Restrict the numbers to index for `IndexNumbersType` fields.
`IndexNumbers0MaxLength` | Restrict the length of terms that do not include numeric values for `IndexNumbersType` fields.
`IndexNumbers1MaxLength` | Restrict the length of pure numeric terms for `IndexNumbersType` fields.
`IndexNumbers2MaxLength` | Restrict the length of alphanumeric terms for `IndexNumbersType` fields.
`IndexNumbersType` | Fields to index as numeric or mixed-alphanumeric fields.
`InvertedAgentType` | Fields that are contained within inverted agents.
`LangDetectType` | Fields to use for automatic language detection when `AutoDetectLanguagesAtIndex` is set to `True`.
`LanguageType` | Fields that hold the language type of documents.
`MatchType` | Fields to store in a fast look-up table in memory to optimize matching of the fields when you use the following `FieldText` specifiers: `ARANGE`, `BIASVAL`, `EQUALCOVER`, `MATCH`, `MATCHALL`, `MATCHCOVER`, `STRING`, `WILD`.
`MemCachedType` | Fields to store in a memory cache.
`NonReversibleType` | Fields whose content is not line-reversed on index, even if the document is detected as being right-to-left Arabic or Hebrew.
`NumericDateType` | Fields that contain numeric dates and are stored in a fast look-up table in memory to optimize matching of the fields when you use `FieldText` specifiers. See NumericDateType Fields.
`NumericIntegerOnly` | Fields with the `NumericType` property store signed 64-bit integer-only values, rather than doubles.
`NumericNormalMaxMem` | The maximum memory (in KB) to allocate for each associated `PropertyFieldCSVs` field that has one of these properties: `NumericDateType`, `NumericType`, `ParametricType`.
`NumericType` | Fields that contain numeric data and are stored in a fast look-up table in memory to optimize matching of the fields when you use `FieldText` specifiers. See NumericType Fields.
`OcrFilterType` | Fields to evaluate by the OCR filter, and not to index or store if its quality is unsatisfactory (the field is stored, but is empty).
`ParametricType` | Fields that hold parametric values.
`ParametricRangeType` | Fields that contain numeric values to use to generate numeric ranges for parametric searches.
`PrintType` | Fields whose content is displayed with results when you set the query action `Print` parameter to `Fields`.
`Ranges` | The number of ranges to use for `ParametricRangeType` fields.
`ReferenceMemoryMappedType` | Fields that hold a value that is an existing value in a different `ReferenceType` field. This is then used in combination with the `FieldRecurse` action parameter and the field specifier `MATCHRECURSE`.
`ReferenceType` | Fields that hold document references. See ReferenceType Fields.
`SectionBreakType` | Fields that hold the section number of documents that were split by the Import module.
`SecurityType` | The security type of documents that contain associated fields.
`SortType` | Fields to store for fast sorting when you use the `ARANGE` `FieldText` specifier or an alphabetical `Sort` option when querying Content. NOTE: OpenText recommends that you optimize `ARANGE` by using the `MatchType` property, rather than `SortType`.
`SourceType` | Fields to use to generate summaries and to suggest conceptually similar documents.
`SynonymType` | Fields that hold the name of the synonym job whose settings apply to documents that contain associated fields.
`TextParseIndexType` | Fields to treat as Index fields when sending a query using the `TextParse` and `AgentBooleanField` parameters.
`TitleType` | Fields that hold document titles.
`TrimSpaces` | Fields from which to remove multiple, leading, or trailing spaces before storing in Content.
`VectorType` | Fields that contain vector values.
`Weight` | The factor by which the weight of terms in associated fields is increased if they match query terms.

NOTE: You cannot configure a field with more than one numeric-based type concurrently. Numeric-based types include `NumericType`, `NumericDateType`, `MatchType`, `ParametricRangeType`, `ReferenceMemoryMappedType`, and `ParametricType` when the `ParametricNumericMapping` configuration parameter is set to `True`.

If your configuration file contains a field with a conflicting configuration, the server uses an internal precedence to set the field property. It flags the configuration conflict in the logs, and in configuration validation.

You can view information about the indexing fields that are defined for the documents in the data index on the Field Types page in the Monitor section of the Knowledge Discovery Admin interface. For more information, refer to the Knowledge Discovery Administration Guide.

Related Topics

- Display Online Help

- Set up the Field Index Process

- Configure a Field Process.

Copyright 2025 Open Text
Version 25.4 | Last updated October 2025

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Product: Knowledge Discovery View Component 25.4

Topic Title: About Fields