NgxCodingComponents

Angular components for coding responses in assessments of IQB.

Dialog boxes

* dialog to show coding scheme
* dialog to show list of responses (before or after coding)
* dialog to show problems of coding scheme (after validation)
* simple message dialog
* simple confirm dialog
* simple input dialog

Schemer Components

* editor for coding scheme
* simple input list of base variable values to check coding scheme
* menu to load and save coding scheme and variable info