Test Name: Line number start value [testcase]
Description:

The text:line-number property specifies a new start value for line numbering. The attribute is only recognized if there is also a text:number-lines attribute with a value of true in the same properties element.

Screenshots: OpenOffice 2.0.1
KOffice 1.5.2 Not supported
Reference: Section 15.5.31 (Formatting Properties/Paragraph Formatting Properties/Line Number Start Value)