> > 'Not equal' in SQL is '<>'. Another relatively well-known 
> > language that uses 'and' and 'or' uses '<>' for inequality 
> > too. Is there any other language besides XSLT+XPath that uses 
> > both AND and '!='? 
> 
> Is there any language besides XSLT+XPath that was designed for embedding
> in XML, which reserves both "&" and "<" for other purposes?
> 

This fact didn't stop designers of the language from using <=, that is &lt;=
form less than or equal. How &lt;= is better than &lt;> or &amp;?

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