LwDITA XDITA and MDITA testing

["Dr. Stanley Doherty" <stan@modularwriting.com>]

Greetings --

I had hoped to get these testing results to you all by Friday, but I ran into some new-job orientation tasks that required attention. 

I have completed the testing that I had planned and posted results to my GitGub repo https://github.com/StanDoherty/LightweightDITATesting. Feel free to clone and test it for yourself. If you have updates/fixes, please let me know and I'll add you as a contributor. I have to add some additional detail to the testing report, but otherwise I am done.   

Here are a few highlights:

1. When we remove HDITA and PDF builds from the text 
   matrix that I worked on last year, we are left 
   with 24 tests that exercise xrefs, keyrefs, and 
   transcludes between XDITA and MDITA. 18 of the 24 
   tests pass. The four that fail involve conditions
   and MDITA conref validation. This is pretty good
   news for anyone wanting to exercise 
   interoperability between XDITA and MDITA.  

2. Block elements: I tested each block element against 
   Oxygen validation (XDITA only) and DITA-OT HTML5 
   build fidelity (XDITA and MDITA). With 35 elements, 
   the test matrix involved 105 test cases. 33 of 35 
   validate in Oxygen XDITA. 20 XDITA elements build 
   successfully in DITA-OT HTML5; the failures are 
   mostly in the multimedia elements. To the extent 
   that there is not a 1:1 correspondence between XDITA 
   and MDITA elements, there are numerous "Not 
   Applicable" test cases. 

3. Inline elements: Other than superscript, subscript, 
   and phrase, XDITA and MDITA maintain parity. 

4. XDITA: The more I work with it, the less  like it. 
   If there are no commercial applications that 
   read/write XDITA, then I assume that 100% of the 
   people working with XDITA already know DITA 1.3.  

Stan