How do I specify not equals to when comparing strings in an XSLT xsl if

Question

Currently i have a xsl with following code where I m trying print out  count  only if it is not equal to N A  but seems like      is not working     lt xsl for-each select  Directory Match  gt       lt xsl if test    Count    N A  gt           lt tr gt               lt td gt  lt xsl value-of select   bookName    gt  lt  td gt               lt td gt  lt xsl value-of select   AuthorName    gt  lt  td gt               lt td gt  lt xsl value-of select  Count    gt  lt  td gt           lt  tr gt       lt  xsl if gt   lt  xsl for-each gt    However  it works if I try to compare it with numeric value   Example    lt xsl if test    Occurrances    0  gt    Can someone please tell me  If I would like to compare strings what can I use

User · Answer

If you want to compare to a string literal you need to put it in  single  quotes    lt xsl if test  Count     N A   gt

User · Answer

As Filburt says  but also note that it s usually better to write  test  not Count    N A      If there s exactly one Count element they mean the same thing  but if there s no Count  or if there are several  then the meanings are different   6 YEARS LATER  Since this answer seems to have become popular  but may be a little cryptic to some readers  let me expand it   The     and      operator in XPath can compare two sets of values  In general  if A and B are sets of values  then     returns true if there is any pair of values from A and B that are equal  while      returns true if there is any pair that are unequal   In the common case where A selects zero-or-one nodes  and B is a constant  say  NA    this means that not A    NA   returns true if A is either absent  or has a value not equal to  NA   By contrast  A     NA  returns true if A is present and not equal to  NA   Usually you want the  absent  case to be treated as  not equal   which means that not A    NA   is the appropriate formulation

[xslt] How do I specify "not equals to" when comparing strings in an XSLT <xsl:if>?

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