xml description files in 0.7.0

[John August]

While there seem to be few obvious bugs, there do seem to be some serious
incompatibilities in the .xml descriptor files between 0.6.0 and 0.7.0

For example, the file aliens6-phil.pingus

has the sequence : 

<groundpiece type="ground">
  <surface><resource type="datafile">
    <resource-datafile>global</resource-datafile>
  <resource-ident>GroundPieces/Misc/piece8</resource-ident>
    <modifier>ROT0</modifier>
  </resource></surface>
  <position>
    <x-pos>417</x-pos>
    <y-pos>549</y-pos>
    <z-pos>0</z-pos>
  </position>
</groundpiece>

- and there's lots of 404 errors with this level.

In contrast, a similar section for hellmouth1-grumbel.pingus (which works)
contains :

<worldobj type="groundpiece">
  <type>ground</type>
  <surface><resource type="datafile">
    <resource-datafile>groundpieces-ground</resource-datafile>
  <resource-ident>misc/bpiece7</resource-ident>
    <modifier>ROT0</modifier>
  </resource></surface>
  <position>
    <x-pos>1065</x-pos>
    <y-pos>292</y-pos>
    <z-pos>0</z-pos>
  </position>
</worldobj>


the "resource-datafile" seems to be a set of files saying "groundpieces-xxxx",
not "global". Further, "piece8" actually appears under "snow" rather than 
"misc".
But, "bpiece8" is under "misc" - perhaps this needs to be changed from "piece8"
to "bpiece8".

In addition, 0.6.0 seemed to not be case sensitive for directory names, but this
seems to be an issue for 0.7.0. Am I right ? If it is an issue, is it 
deliberate ?

There's obviously some changes in approach between the 0.7.0 and 0.6.0 
descriptor
files. What are they ?

Thanks,

-- 
It is, because it can be.

John August.