1. add-attribute-button

1. add-attribute-button
	Chapter 5. Content objects

Inserts a command-button in generated content which can be used to add an attribute to the element for which the button has been generated.

Key	Value	Default	Description
check-has-attributes	Boolean: yes\|no, 1\|0, true\|false, on\|off	no	yes means: do not generate this button when the target element has no attributes (attribute wildcards and `xsi`:* attributes are ignored).
use-default-attribute-value	Boolean: yes\|no, 1\|0, true\|false, on\|off	no	yes means: newly added attribute is given its default value (as specified in the schema) if any, "`???`" otherwise.

Do not specify command, parameter or menu parameters for this type of command-button. A menu of putAttribute commands is built dynamically each time this button is clicked.

By default, this button has its icon set to icon(plus).

Examples:

add-attribute-button()

add-attribute-button(text, "Add attr.", 
                     check-has-attributes, yes,
                     use-default-attribute-value, yes)