<html>
Value not touched
<input type="text" name="test1" value="passed"
tal:attributes="value value | default"/>
No value :
<input type="text" name="test2"
tal:attributes="value value | default"/>
Name and empty value :
<input type="text" name="test3" value=""
tal:attributes="value value | default;
name name | default;"/>
No name and no value :
<input type="text"
tal:attributes="value value | default;
name name | default;"/>
<span tal:define="global name 'test'; global value 'passed2'" />
Value replaced by passed2 :
<input type="text" name="test1" value="passed"
tal:attributes="value value | default"/>
Value set to passed2 :
<input type="text" name="test2"
tal:attributes="value value | default"/>
Name replaced by test and value by passed2 :
<input type="text" name="test3" value=""
tal:attributes="value value | default;
name name | default;"/>
Value set to passed2 and name to test :
<input type="text"
tal:attributes="name name | default;
value value | default;"/>
<span tal:comment="Redefine for new test"
tal:define="global name 'test'; global value nothing"/>
Value not touched name set to test :
<input type="text" value="stay"
tal:attributes="value value | default;
name name | default;"/>
</html>