I disagree with the expected result of the following test.

  <test-case name="try-catch-all-dynamic-errors-caught-1">
    <description>XPDY0002 must be caught.</description>
    <created by="Ghislain Fourny" on="2011-07-28"/>
    <environment ref="err"/>
    
    <test>try { . } catch err:XPDY0002 { "Context item not set." }</test>
    <result>
      <assert-string-value>Context item not set.</assert-string-value>
    </result>
  </test-case>

I do not think that XPDY0002 should be caught here.

Recall that . is represented by the Formal Semantics as a variable called $fs:dot.

Compare with variations on this test:

declare variable $x external;
try { $x } catch err:XPDY0002 { "External variable not set." }

declare variable $x := fn:error("err:XPDY0002");
try { $x } catch err:XPDY0002 { "External variable raised error." }