Meaning of template_version in metadata

["Nemeth, Denes (Nokia - HU/Budapest)" <denes.nemeth@nokia.com>]

Dear Tosca community

 

Can you help us how to interpret template_version in the metadata section of the service template.

In Tosca 1.3:

• 3.10.3.5: This optional metadata keyname can be used to declare a domain specific version of the service template as a single-line string value.
• 6.3:  The CSAR-Version is defined by the template_version metadata section.

 

What is the meaning of the template_version CSAR-Version or domain specific version?

 

This is also present in Tosca 1.X and 2.0.

 

Cheers Denes