html标签的引号嵌套,使用YQL多查询＆amp; XPath解析HTML，如何转义嵌套引号？

标题比它必须更复杂，这是问题查询。

SELECT *

FROM query.multi

WHERE queries="

SELECT *

FROM html

WHERE url='http://www.stumbleupon.com/url/http://www.guildwars2.com'

AND xpath='//li[@class="listLi"]/div[@class="views"]/a/span';

SELECT *

FROM xml

WHERE url='http://services.digg.com/1.0/endpoint?method=story.getAll&link=http://www.guildwars2.com';

SELECT *

FROM json

WHERE url='http://api.tweetmeme.com/url_info.json?url=http://www.guildwars2.com';

SELECT *

FROM xml

WHERE url='http://api.facebook.com/restserver.php?method=links.getStats&urls=http://www.guildwars2.com';

SELECT *

FROM json

WHERE url='http://www.reddit.com/button_info.json?url=http://www.guildwars2.com'"

特别是这条线，

xpath='//li[@class="listLi"]/div[@class="views"]/a/span'

这是有问题的，因为引用，我必须嵌套他们三个级别深，我已经用完了引号字符。我尝试了以下变化而没有成功：

//no attribute quoting

xpath='//li[@class=listLi]/div[@class=views]/a/span'

//try to quote attribute w/ backslash & single quote

xpath='//li[@class='listLi']/div[@class='views']/a/span'

//try to quote attribute w/ backslash & double quote

xpath='//li[@class="listLi"]/div[@class="views"]/a/span'

//try to quote attribute with double single quotes, like SQL

xpath='//li[@class=''listLi'']/div[@class=''views'']/a/span'

//try to quote attribute with double double quotes, like SQL

xpath='//li[@class=""listLi""]/div[@class=""views""]/a/span'

//try to quote attribute with quote entities

xpath='//li[@class="listLi"]/div[@class="views"]/a/span'

//try to surround XPath with backslash & double quote

xpath="//li[@class='listLi']/div[@class='views']/a/span"

//try to surround XPath with double double quote

xpath=""//li[@class='listLi']/div[@class='views']/a/span""

一切都没有成功。

我没有看到很多关于转义XPath字符串的内容，但是我发现的所有内容似乎都是使用concat的变体(这不会有帮助，因为既不'或'也不可用)或html实体。不使用引号的属性不抛出错误但失败，因为它不是我需要的实际XPath字符串。

我在YQL文档中没有看到任何关于如何处理转义的内容。我知道这有多优势，但希望他们有某种逃避指南。