enid

不想被转义的时候就用这个，比如像下面的数据,特殊字符都没有被转义

<exampleOfACDATA>
<![CDATA[
    Since this is a CDATA section
    I can use all sorts of reserved characters
    like > < " and &
    or write things like
    <foo></bar>
    but my document is still well formed!
]]>
</exampleOfACDATA>

Fackbook 搞得，为了规范分享的内容。

http://ogp.me/

下面是一些类库&工具：

• Facebook Object Debugger - Facebook's official parser and debugger
• Google Rich Snippets Testing Tool - Open Graph protocol support in specific verticals and Search Engines.
• PHP Validator and Markup Generator - OGP 2011 input validator and markup generator in PHP5 objects
• PHP Consumer - a small library for accessing of Open Graph Protocol data in PHP
• OpenGraphNode in PHP - a simple parser for PHP
• PyOpenGraph - a library written in Python for parsing Open Graph protocol information from web sites
• OpenGraph Ruby - Ruby Gem which parses web pages and extracts Open Graph protocol markup
• OpenGraph for Java - small Java class used to represent the Open Graph protocol
• RDF::RDFa::Parser - Perl RDFa parser which understands the Open Graph protocol
• WordPress plugin - Facebook's official WordPress plugin, which adds Open Graph metadata to WordPress powered sites.
• Alternate WordPress OGP plugin -