Semantic and phonetic interpretation are, in principle, treated identically, with a number of specific constraints concerned with the assignment of recursive brackets to MEAN and the entirely analogous recursive assignment of lexical stress to SURF PHON, depending on the morphological category.
Interpretation:
<> == First Operator Second
<plain> == <>.
First:
<> == StressOp "<modi>"
<mean> == { "<head mean>" _
<plur mean> == { "<head plur mean>" _ .
Second:
<> == "<head>"
<mean> == _ { "<modi mean>" } }
<plur mean> == _ { "<modi plur mean>" } }.
Operator:
<> == "<operator>".
StressOp:
<> ==
<surf phon> == <stress "<cat morph>">
<plur surf phon> == <surf phon>
<stress stem> == /
<stress compound> == /
<stress> == .