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%answer-para-level; Inside an Answer Paragraph-Level Elements

The elements that may be used at the same structural level as a paragraph, when used inside an <answer>. Remarks: This rather awkward parameter entity was created to overcome the DTD determinism issues when using <explanation> inside an <answer>. In order for <explanation> to be used at the end of an answer, it must not be allowed at the paragraph level inside <answer>.

<!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;"           >