I have a source xml like following:
There are two problems in your XSLT. Firstly, where you match the s1 and s2 elements, you are not subsequently trying to apply templates to any attributes. You need to replace this statement
With this statement
Secondly, you don't have any templates to match such attributes. You need a template like so:
Try this XSLT
http://sample.com/t targetSchema.xsd
When applied to your sample XML, the following is output:
123 test street