中国社会科学院世界经济与政治研究所副所长 张斌委员
Featured Video For You。业内人士推荐新收录的资料作为进阶阅读
沪公网安备31010602000299号。新收录的资料对此有专业解读
In total 97 105 071 (2.9%) of the URLs and 127 523 211 (27.8%) of the forms in the set contained elements with one of the pattern attributes. So in general, forms are not very common on web pages, and pattern elements are only moderately common in forms. Note that a web page may contain any number of forms and that forms may repeat across URLs. A typical example would be an email registration form in a page footer or a search bar in a header. To avoid a potentially complex discussion about what constitutes a web page (everything across a domain? What about subdomains?), I used the URL as my base unit. So each instance of the same search bar counts.