еıȽ϶ڴϽ: <tt>string1 rel string2</tt>.
 <tt>and</tt>  <tt>or</tt> ѱȽϽ. 
ԹɸӵıȽʽ.

:ЧĹϵ
:ϵ,

:==
string1  ==  string2  string1  =  string2 
true(),  <tt> string1</tt>  <tt>string2</tt> ȫͬ.
:!=
string1  !=  string2  string1  &lt;&gt;  string2
true(),  <tt> string1</tt>  <tt>string2</tt> ͬ.
:<
string1  <  string2
true(), ֵ <tt>string1</tt> < <tt>string2</tt>.
:<=
string1  <=  string2
true(), ֵ <tt>string1</tt> $m_le <tt>string2</tt>.
:>
string1  >  string2
true(), ֵ <tt>string1</tt> > <tt>string2</tt>.
:>=
string1  >=  string2
true(), ֵ <tt>string1</tt> $m_ge <tt>string2</tt>.
:isin
string1  isin  string2
true(),  <tt>string1</tt>  <tt>string2</tt> Ӵ.
:notin
string1  notin  string2
true(),  <tt>string1</tt>  <tt>string2</tt> Ӵ.
:iswordof
string1  iswordof  string2
true(),  <tt>string1</tt>  <tt>string2</tt> һ.
:notwordof
string1  notwordof  string2
true(),  <tt>string1</tt>  <tt>string2</tt> һ.
:isvarof
string1  isvarof  string2
true(),  <tt>string1</tt> Ǳʽ <tt>string2</tt> һ(ѧ).
:notvarof
string1  notvarof  string2
true(),  <tt>string1</tt> Ǳʽ <tt>string2</tt> һ(ѧ).
:isvariableof
string1  isvariableof  string2
true(),  <tt> string1</tt> Ǳʽ <tt>string2</tt> һ(ѧ).
:notvariableof
string1  notvariableof  string2
true(),  <tt> string1</tt> Ǳʽ <tt>string2</tt> һ(ѧ).
:isitemof
string1  isitemof  string2
true(),  <tt> string1</tt> Ǳ <tt>string2</tt> һ.
:notitemof
string1  notitemof  string2
true(),  <tt> string1</tt> Ǳ <tt>string2</tt> һ.
:islineof
string1  islineof  string2
true(),  <tt> string1</tt> Ǳ <tt>string2</tt> һ.
:notlineof
string1  notlineof  string2
true(),  <tt> string1</tt> Ǳ <tt>string2</tt> һ.
:issamecase
string1  issamecase  string2
true(),  <tt> string1</tt>  <tt>string2</tt> ͬ, ȽʱǶĿո, Сдĸ.
:notsamecase
string1  notsamecase  string2
true(),  <tt> string1</tt>  <tt>string2</tt> вͬ, ȽʱǶĿո, Сдĸ.
:issametext
string1  issametext  string2
true(),  <tt> string1</tt>  <tt>string2</tt> ͬ, ȽʱǶĿո񡢴Сдĸŵĸ.
:notsametext
string1  notsametext  string2
true(),  <tt> string1</tt>  <tt>string2</tt> вͬ, ȽʱǶĿո񡢴Сдĸŵĸ.

