Domain fixed value need to set as default in UI

Hi Experts ,

I am facing an issue where domain having two fixed values ...

INITIAL VALUE TEXT

X Yes

= ' ' No

In webdynpro when I bind the data element of this domain three dropdown text is coming ...

1 . Space

2 . Yes

3. No

I am trying to set this field in ui with default value = NO.

In the coding part when I set the field value = abap_true then Yes is set in UI as default but when value = abap_false it's picking only initial value means Space is set as default ..

I need to set it as NO.

Please help me to solve out this issue.

Thanks in advance.

Samrat