xml参数实体问题
<?xml version="1.0" encoding="UTF-8"?>
<!ELEMENT NEWSPAPER (ARTICLE+)>
<!ELEMENT ARTICLE (HEADLINE, BYLINE )>
<!ENTITY % test "Copyright 1998 Vervet Logic Press">
<!ELEMENT HEADLINE (BYLINE, %test;)>
<!ELEMENT BYLINE (#PCDATA)>
为什么用 %test;有问题,提示说交验不过去,缺%
给个用参数实体的例子也行,越简单越好