lt: less than <小于
gt: greater than >大于
lte: less than or equal to <= 小于等于
gte: greater than or equal to >= 大于等于
结构* html
* head
* body
* div
* span
Meta Information
* DOCTYPE
* title
* link
* meta
* style
文字
* p
* h1, h2, h3, h4, h5, h6
* strong
* em
* abbr
* acronym
* address
* bdo
* blockquote
* cite
* q
* code
* ins
* del
* dfn
* kbd
* pre
* samp
* var
* br
连接
* a
* base
图片、对象
* img
* area
* map
* object
* param
列表
* ul
* ol
* li
* dl
* dt
* dd
表格
* table
* tr
* td
* th
* tbody
* thead
* tfoot
* col
* colgroup
* caption
表单
* form
* input
* textarea
* select
* option
* optgroup
* button
* label
* fieldset
* legend
脚本
* script
* noscript
文字修饰
* b, i, tt, sub, sup, big, small, hr