fieldExists()
Method of the data
object that returns true if a certain metadata field, column or node exists. (See data.)
fieldExists(levelName, propertyName)
This method returns true if the given metadata field exists at the given level in a PDF/VT or AFP file.
levelName
String, specifying a level in the PDF/VT or AFP file.
propertyName
String, specifying the metadata field.
fieldExists(fieldName)
This method returns true if a column with the specified name exists in the current record in a CSV, XLS or XLSX file.
To verify whether a column specified by index exists in a CSV, XLS or XLSX file, use fieldExistsByIndex(index).
fieldName
String that represents a field name (column) in a CSV, XLS or XLSX file.
fieldExists(xPath)
This method returns true if the specified node exists in the current record in an XML file.
xPath
String that specifies a node.
fieldExists(jPath)
This method returns true if the specified element exists in the current record in a JSON file.
jPath
String that specifies an element.