--- schema_version: "1" id: 8e69d363ca5e9409d7974100fe0a2a147fad0a6cbacb3b805178ac85479084cc title: What’s New in DataWeave collection: mulesoft version: current locale: en-us portal_url: https://docs.salesforce.com/mulesoft/current/en-us/dataweave/2.4/whats-new-in-dw.md canonical_url: https://docs.mulesoft.com/dataweave/2.4/whats-new-in-dw source_site: docs.mulesoft.com content_type: documentation content_hash: 11d87ec3f87153eb4c5e08794feb58dd1ebdf6d7f7d26b401af85754e4be007f description: MuleSoft Documentation Site release: "2.4" latest: false --- --- product: DataWeave version: 2.4 --- # What’s New in DataWeave > For the full documentation index, see: https://docs.mulesoft.com/llms.txt DataWeave 2.4 is bundled with Mule 4.4. The 2.4 version of DataWeave introduces the following features: - Ability to read larger-than-memory strings automatically. When you are using the indexed reader strategy and processing a String with a size larger than 1.5 MB, DataWeave automatically splits the value in chunks to avoid out-of-memory issues. Related reader properties are `com.mulesoft.dw.max_memory_allocation` and `com.mulesoft.dw.buffered_char_sequence.enabled`. Refer to [Indexed Readers in DataWeave](https://docs.mulesoft.com/dataweave/2.4/dataweave-indexed-readers#large-strings-management). - New reader and writer properties for working with data formats. For example, the XML writer now enables you to define namespaces at the root level. - Many new modules, functions, types, annotations, and variables. Some are experimental and subject to change in future releases. - A number of functions are overloaded to introduce new helper functions for handling `null` values. Changes to the documentation include more detailed function signatures and organization of the functions by their module names, such as `dw::Core`, `dw::core::Strings`, and `dw::util::Math`. DataWeave 2.4 is bundled with Mule 4.4. For information about the Mule 4.4 release, refer to [What’s New in Mule 4.4](https://docs.mulesoft.com/mule-runtime/4.4/whats-new-in-mule). ## New Properties for Data Formats DataWeave introduces the following reader and writer properties: - DataWeave (dw) reader property: `privileges` enables you to provide a comma-separated list of privileges to use in the format, such as `'Resources,Properties'`. - Excel (XLSX) reader property: `tableLimit` enables you to set position of the last column in each row. - YAML writer property: `writeDeclaration` enables you to write the header declaration. - XML writer properties: `defaultNamespace` specifies the default namespaces of the output XML , and `writeDeclaredNamespaces` marks the namespaces to declare in the root element of the XML. ## New DataWeave Function Modules and Features New DataWeave modules and features: - [dw::Core](https://docs.mulesoft.com/dataweave/2.4/dw-core) introduces new functions and annotations: - [indexOf](https://docs.mulesoft.com/dataweave/2.4/dw-core-functions-indexof) - [lastIndexOf](https://docs.mulesoft.com/dataweave/2.4/dw-core-functions-lastindexof) - [onNull](https://docs.mulesoft.com/dataweave/2.4/dw-core-functions-onnull) - [then](https://docs.mulesoft.com/dataweave/2.4/dw-core-functions-then) - [Core Annotations](https://docs.mulesoft.com/dataweave/2.4/dw-core-annotations) introduces a number of new annotations. - [dw::core::Dates](https://docs.mulesoft.com/dataweave/2.4/dw-dates) is a new module with functions and types to create and manipulate Date types, for example, the function `today`. - [dw::core::Strings](https://docs.mulesoft.com/dataweave/2.4/dw-strings) introduces new functions: - [collapse](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-collapse) - [countCharactersBy](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-countcharactersby) - [countMatches](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-countmatches) - [everyCharacter](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-everycharacter) - [first](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-first) - [hammingDistance](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-hammingdistance) - [last](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-last) - [levenshteinDistance](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-levenshteindistance) - [lines](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-lines) - [mapString](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-mapstring) - [remove](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-remove) - [replaceAll](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-replaceall) - [reverse](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-reverse) - [someCharacter](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-somecharacter) - [substring](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-substring) - [substringBy](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-substringby) - [substringEvery](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-substringevery) - [words](https://docs.mulesoft.com/dataweave/2.4/dw-strings-functions-words) - [dw::util::Coercions](https://docs.mulesoft.com/dataweave/2.4/dw-coercions) is a new DataWeave module with functions and types to simplify data type transformations, for example, the function `toString`. - [dw::util::Math](https://docs.mulesoft.com/dataweave/2.4/dw-math) is a new DataWeave module with functions and variables that provides mathematical functions, for example, the function `sin`. - [dw::util::Periods](https://docs.mulesoft.com/dataweave/2.4/dw-periods) is a new DataWeave module with functions and types to simplify the creation of Periods, for example, the function `days`. - [dw::util::Tree](https://docs.mulesoft.com/dataweave/2.4/dw-tree) introduces new functions: - [filterArrayLeafs](https://docs.mulesoft.com/dataweave/2.4/dw-tree-functions-filterarrayleafs) - [filterObjectLeafs](https://docs.mulesoft.com/dataweave/2.4/dw-tree-functions-filterobjectleafs) - [filterTree](https://docs.mulesoft.com/dataweave/2.4/dw-tree-functions-filtertree) - [isArrayType](https://docs.mulesoft.com/dataweave/2.4/dw-tree-functions-isarraytype) - [isAttributeType](https://docs.mulesoft.com/dataweave/2.4/dw-tree-functions-isattributetype) - [isObjectType](https://docs.mulesoft.com/dataweave/2.4/dw-tree-functions-isobjecttype) - [dw::util::Values](https://docs.mulesoft.com/dataweave/2.4/dw-values-types) provides a new type `UpdaterValueProvider`.