Context: 
XML databases are a type of structured document-oriented database that allows querying based on XML document attributes. XML databases are mostly used in enterprise database management, where XML is being used as the machine-to-machine data interoperability standard. XML database management systems include commercial software MarkLogic and Oracle Berkeley DB XML, and a free use software Clusterpoint Distributed XML/JSON Database. All are enterprise software database platforms and support industry standard ACID-compliant transaction processing with strong database consistency characteristics and high level of database security.

Question: What kind of database is XML?
Answer: structured document-oriented database

Question: Where are XML databases frequently used?
Answer: enterprise database management

Question: How is XML used in enterprise database management?
Answer: machine-to-machine data

Question: What type of processing is used in enterprise database software?
Answer: ACID-compliant transaction processing

Question: What kind of database is ZML?
Answer: Unanswerable

Question: Where are XML databases never used?
Answer: Unanswerable

Question: How is XML bypassed in enterprise database management?
Answer: Unanswerable

Question: What type of processing is forbidden in enterprise database software?
Answer: Unanswerable