Zen Parse Expression

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Overview

• Evaluating expression type Zen expressions that return transformed data
• Evaluating unary type boolean conditions against the root context ($)
• Storing results in the data field or children array

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Command Type

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Parameters

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Usage Examples

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Evaluate an Expression

{
  "command": "zen-parse",
  "params": {
    "evaluationType": "expression",
    "expression": "( id: $.eventId, name: $.eventName )",
    "timeout": 5000
  }
}

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Evaluate a Unary Condition

{
  "command": "zen-parse",
  "params": {
    "evaluationType": "unary",
    "expression": "$.odds > 1.5",
    "timeout": 3000
  }
}

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Output to Children Array

{
  "command": "zen-parse",
  "params": {
    "evaluationType": "expression",
    "expression": "$.items.( id: id, label: name )",
    "timeout": 5000,
    "key": "children"
  }
}

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Evaluation Types

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Output Key Options

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Common Use Cases

• Conditional Filtering: Use unary mode to evaluate pass/fail conditions in the pipeline
• Data Reshaping: Use expression mode to produce a new object structure
• Lightweight Transforms: Apply simple Zen expressions without the full JDM graph overhead

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Related Commands

• JSONata - Evaluate JSONata expressions against input data
• Transform By JDM - Transform data using full JDM rules
• Filter - Filter collections based on field values