Binary descriptions:

accounts-qml-module-doc: Online Accounts QML - documentation
qml-module-ubuntu-onlineaccounts: Expose the Online Accounts API to QML applications
qml-module-ubuntu-onlineaccounts-dbgsym: No summary available for qml-module-ubuntu-onlineaccounts-dbgsym in ubuntu disco.
qtdeclarative5-accounts-plugin: transitional dummy package for Online Accounts QML clients