The CloudGraph™ composite
row key configuration model is a flexible, configurable approach within the
very important area of composite row keys. A selection of pre-defined row key
fields are available and users may also define custom fields using XPath
expressions which map or resolve the row key field to any data property within
a data graph. Composite row keys may involve any number of fields in any order,
whether pre-defined or user-defined, each adding another queryable
"dimension" to the key.