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You can get configure how you will get the metadata out of the text or metadata by setting script flags.  For example, you can receive the metadata as _doc, _metadata, or as full text.

Also, when iterating over a JSON array each item in the array is passed into the ScriptEngine and is made accessible via an object named: _iterator.

Examples:

_doc.metadata

"city": "$SCRIPT( return _doc.metadata.location[0].citystateprovince.city; )",

_metadata

 "contentMetadata": [                {
                    "fieldName": "email_meta",
                    "script": "var x=_metadata._FILE_METADATA_[0].metadata;x;",
                    "scriptlang": "javascript",
                    "flags": "m"

iterator

var make = _iterator.make;
var model = _iterator.model;
var year = _iterator.year;

For more information about using javascript to get metadata and for detailed examples and descriptions, see Content metadata, Manual text transformation.

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You can use javascript to create entities and associations by calling the metadata using the $SCRIPT and $FUNC scripting conventions.For example, When document metadata iterates over a JSON array each item in the array is passed into the ScriptEngine and is made accessible via an object named: _iterator.

For more information about using javascript to create entities and associations, see Manual entities, Manual association of entities.

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