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%answer-para-level; Answer Only Paragraph Level

Created for use in the model of <answer> to prohibit <explanation> at the paragraph level inside <answer>, because that created DTD determinism problems.
Declaration
<!ENTITY % answer-para-level   
                        "%block-display-minus-explanation.class; | 
                         %block-math.class; |
                         %list.class; | %math.class; |
                         %nothing-but-para.class; |
                         %related-article.class; |
                         %rest-of-para.class; | %x.class;"           >
Expanded Declaration

address | alternatives | answer | answer-set | array | boxed-text | chem-struct-wrap | code | fig | fig-group | graphic | media | name-address-wrap | preformat | question | question-wrap | question-wrap-group | supplementary-material | table-wrap | table-wrap-group | disp-formula | disp-formula-group | def-list | list | tex-math | mml:math | p | related-article | related-object | ack | disp-quote | speech | statement | verse-group | x