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ODM 2v2.0 can be serialized as either XML or JSON.

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An XML file conforms to the ODM 2v2.0 standard only if it satisfies all the criteria detailed in this standard. These criteria include both syntactic constraints and semantic ones.

The syntactic constraints for ODM 2v2.0 XML files are:

1. The ODM file must be a well-formed XML file. See the XML standard for details.
2. The ODM file must conform to the XML Namespace standard. See the XML Namespace standard for details.
3. The ODM file must contain only elements and attributes defined in the ODM standard schema or in a valid vendor extension schema, and must satisfy the rules about element nesting and the formats of attribute values and element bodies.
4. The ODM file must contain a single (top-level) ODM element
5. The ODM file must use the ODM 2v2.0 namespace, which is "http://www.cdisc.org/ns/odm/v2.0"
6. The ODMVersion attribute on the top-level ODM element must be set to "2.0"
7. The ODM file should begin with a prolog, or XML declaration, as this is considered a best practice 

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The syntactic constraints for ODM 2v2.0 JSON files are:

1. The ODM file must be a well-formed JSON file. See the ECMA-404 standard for details.
2. The ODM file must satisfy the rules about element nesting and the formats of values defined in the ODM standard. 

   Jira
   server Issue Tracker (JIRA) columnIds issuekey,summary,issuetype,created,updated,duedate,assignee,reporter,priority,status,resolution columns key,summary,type,created,updated,due,assignee,reporter,priority,status,resolution serverId 85506ce4-3cb3-3d91-85ee-f633aaaf4a45 key ODM-34

3. The root object corresponds to the ODM element.
4. The ODMVersion attribute of the root object must be set to "2.0".

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