XPath

Overview

The XPath XML Extractor Component extracts data from XML content using a specified XPath expression. This allows precise retrieval of elements, attributes, or values from structured XML data.

Usage

This component takes an XML string as input and applies an XPath query to extract specific information.

Input Ports

Port	Description
in	Accepts an XML string and an XPath expression for processing.

Input Properties

Property	Type	Description
xml	string	XML content to process.
xpath	string	XPath expression for selecting elements. E.g., '//title'.

Output Ports

Port	Description
out	Provides the extracted data from XML based on the XPath expression.

Output Properties

Property	Type	Description
result	string	Extracted data based on the given XPath expression.

Processing Logic

1. Parse XML Input: Converts the input XML string into a DOM object.

2. Apply XPath Expression: Executes the XPath query on the parsed XML.

3. Format Extracted Data: If multiple matches are found, results are concatenated into a single string.

4. Send Output: The extracted data is emitted through the out port.

Notes

• Flexible Queries: Supports selecting elements, attributes, and text nodes via XPath.

• Handles Multiple Matches: When multiple elements match the XPath, results are concatenated.

• Efficient XML Parsing: Uses xmldom and xpath libraries for reliable parsing and selection.

This component provides a powerful way to extract and manipulate XML data using XPath expressions, making it highly useful for XML-based workflows.