https://www.boost.org/doc/libs/1_66_0/libs/spirit/doc/html/spirit/advanced/customize/auto/create_parser.html
Define a Custom Attribute Mapping for a Parser
custom attribute mappingdefineparser
https://www.jetbrains.com/help/youtrack/devportal/HUB-REST-API_Auth-Modules_Custom-Attribute-Mappings-of-Auth-Module_Add-Custom-Attribute-Mapping-to-Custom-Attribute-Mappings-of-a-Auth-Module.html
Add Custom Attribute Mapping to Custom Attribute Mappings of a Auth Module | Developer Portal for...
custom attribute mapping