1. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns"> 
  <foo a="1"/>
  <foo a="2"/>
</root>

Patch:
<add sel="*/foo[@a='1']" pos="before"><foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- comment -->
  <?foo p="e"?>
  </add>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns"> 
  <foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- comment -->
  <?foo p="e"?>
  <foo a="1"/>
  <foo a="2"/>
</root>

2. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns"> 
  <foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- comment -->
  <?foo p="e"?>
  <foo a="1"/>
  <foo a="2"/>
</root>

Patch:
<add sel="*/foo[@a='1']" type="@b">foo</add>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns"> 
  <foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- comment -->
  <?foo p="e"?>
  <foo a="1" b="foo"/>
  <foo a="2"/>
</root>

3. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns"> 
  <foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- comment -->
  <?foo p="e"?>
  <foo a="1" b="foo"/>
  <foo a="2"/>
</root>

Patch:
<add sel="*/foo[@a='1']" type="namespace::p">urn:xxx</add>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns"> 
  <foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- comment -->
  <?foo p="e"?>
  <foo xmlns:p="urn:xxx" a="1" b="foo"/>
  <foo a="2"/>
</root>

4. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns"> 
  <foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- comment -->
  <?foo p="e"?>
  <foo xmlns:p="urn:xxx" a="1" b="foo"/>
  <foo a="2"/>
</root>

Patch:
<add sel="*/foo[@a='1']" type="@y:b">bar</add>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns"> 
  <foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- comment -->
  <?foo p="e"?>
  <foo xmlns:p="urn:xxx" a="1" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

5. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns"> 
  <foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- comment -->
  <?foo p="e"?>
  <foo xmlns:p="urn:xxx" a="1" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

Patch:
<replace sel="*/foo[@a='1']/namespace::p">urn:new</replace>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns"> 
  <foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- comment -->
  <?foo p="e"?>
  <foo xmlns:p="urn:new" a="1" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

6. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns"> 
  <foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- comment -->
  <?foo p="e"?>
  <foo xmlns:p="urn:new" a="1" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

Patch:
<replace sel="*/foo[@a='1']/namespace::p">urn:xxx</replace>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns"> 
  <foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- comment -->
  <?foo p="e"?>
  <foo xmlns:p="urn:xxx" a="1" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

7. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns"> 
  <foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- comment -->
  <?foo p="e"?>
  <foo xmlns:p="urn:xxx" a="1" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

Patch:
<replace sel="*/comment()">
<!-- new comment -->
</replace>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns"> 
  <foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- new comment -->
  <?foo p="e"?>
  <foo xmlns:p="urn:xxx" a="1" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

8. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns"> 
  <foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- new comment -->
  <?foo p="e"?>
  <foo xmlns:p="urn:xxx" a="1" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

Patch:
<replace sel="*/text()[1]">replaced text</replace>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">replaced text<foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- new comment -->
  <?foo p="e"?>
  <foo xmlns:p="urn:xxx" a="1" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

9. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">replaced text<foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- new comment -->
  <?foo p="e"?>
  <foo xmlns:p="urn:xxx" a="1" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

Patch:
<replace sel="*/foo[@a='1']/@a">1+</replace>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">replaced text<foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- new comment -->
  <?foo p="e"?>
  <foo xmlns:p="urn:xxx" a="1+" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

10. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">replaced text<foo a="3">
    <bar/>
    <t:test xmlns:t="urn:test">
      <t:bar/>
    </t:test>  
  </foo>
  <!-- new comment -->
  <?foo p="e"?>
  <foo xmlns:p="urn:xxx" a="1+" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

Patch:
<replace sel="*/foo[@a='3']">
  <bar a="3"/>
</replace>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">replaced text<bar a="3"/>
  <!-- new comment -->
  <?foo p="e"?>
  <foo xmlns:p="urn:xxx" a="1+" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

11. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">replaced text<bar a="3"/>
  <!-- new comment -->
  <?foo p="e"?>
  <foo xmlns:p="urn:xxx" a="1+" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

Patch:
<replace sel="*/processing-instruction('foo')">
<?foo b="rrr" s="gggggg" ?>
</replace>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">replaced text<bar a="3"/>
  <!-- new comment -->
  <?foo b="rrr" s="gggggg" ?>
  <foo xmlns:p="urn:xxx" a="1+" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

12. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">replaced text<bar a="3"/>
  <!-- new comment -->
  <?foo b="rrr" s="gggggg" ?>
  <foo xmlns:p="urn:xxx" a="1+" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

Patch:
<remove sel="*/text()[1]"/>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns"><bar a="3"/>
  <!-- new comment -->
  <?foo b="rrr" s="gggggg" ?>
  <foo xmlns:p="urn:xxx" a="1+" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

13. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns"><bar a="3"/>
  <!-- new comment -->
  <?foo b="rrr" s="gggggg" ?>
  <foo xmlns:p="urn:xxx" a="1+" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

Patch:
<remove sel="*/bar[@a='3']"/>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">
  <!-- new comment -->
  <?foo b="rrr" s="gggggg" ?>
  <foo xmlns:p="urn:xxx" a="1+" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

14. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">
  <!-- new comment -->
  <?foo b="rrr" s="gggggg" ?>
  <foo xmlns:p="urn:xxx" a="1+" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

Patch:
<remove sel="*/foo[@a='1+']/@a"/>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">
  <!-- new comment -->
  <?foo b="rrr" s="gggggg" ?>
  <foo xmlns:p="urn:xxx" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

15. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">
  <!-- new comment -->
  <?foo b="rrr" s="gggggg" ?>
  <foo xmlns:p="urn:xxx" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

Patch:
<remove sel="*/comment()" ws="after"/>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">
  <?foo b="rrr" s="gggggg" ?>
  <foo xmlns:p="urn:xxx" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

16. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">
  <?foo b="rrr" s="gggggg" ?>
  <foo xmlns:p="urn:xxx" b="foo" p:b="bar"/>
  <foo a="2"/>
</root>

Patch:
<remove sel="*/foo[@b='foo']/@y:b"/>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">
  <?foo b="rrr" s="gggggg" ?>
  <foo xmlns:p="urn:xxx" b="foo"/>
  <foo a="2"/>
</root>

17. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">
  <?foo b="rrr" s="gggggg" ?>
  <foo xmlns:p="urn:xxx" b="foo"/>
  <foo a="2"/>
</root>

Patch:
<remove sel="*/foo[@b='foo']/namespace::p"/>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">
  <?foo b="rrr" s="gggggg" ?>
  <foo b="foo"/>
  <foo a="2"/>
</root>

18. Patching document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">
  <?foo b="rrr" s="gggggg" ?>
  <foo b="foo"/>
  <foo a="2"/>
</root>

Patch:
<remove sel="*/processing-instruction('foo')" ws="before"/>
patch succeeded.

Updated document:
<?xml version="1.0" encoding="UTF-8"?>
<root xmlns="urn:ns">
  <foo b="foo"/>
  <foo a="2"/>
</root>

Patching successful