Subject: Re: Check if XML tag exists? From: Oliver Becker <obecker@xxxxxxxxxxxxxxxxxxxxxxx> Date: Thu, 17 Aug 2000 10:53:24 +0200 (MET DST) |
Hi David, > Is there a way I can check if a TAG in the XML data exists or not, even > though the possibly existing TAG will not have any value? > > Background is... in this instance everything would be hidden. > > <RESTRICTED_FIELD_LIST> > > <HIDE_OFFICE_ALL /> > <HIDE_HOME_ALL /> > > </RESTRICTED_FIELD_LIST> > > But in this instance ALL the Office info would be hidden while only the > Home Address info would be hidden. > > <RESTRICTED_FIELD_LIST> > > <HIDE_OFFICE_ALL /> > <HIDE_HOME_ADDRESS /> > > </RESTRICTED_FIELD_LIST> > > The HIDE_HOME_ALL is no longer in the data. > > Can I check to see if a TAG exists or not? You want to check if an *element* exists or not. :-) Well, probably the following template does what you want: <xsl:template match="RESTRICTED_FIELD_LIST"> <xsl:if test="HIDE_HOME_ALL"> <!-- Ah, HIDE_HOME_ALL is present --> <!-- Do something reasonable ... --> </xsl:if> </xsl:template> Note: if you want to test wether an element is empty or not, you have to compare with '' or apply the string function: <xsl:if test="string(HIDE_HOME_ALL)"> <!-- HIDE_HOME_ALL is present and not empty --> </xsl:if> Hope that helps, Oliver /-------------------------------------------------------------------\ | ob|do Dipl.Inf. Oliver Becker | | --+-- E-Mail: obecker@xxxxxxxxxxxxxxxxxxxxxxx | | op|qo WWW: http://www.informatik.hu-berlin.de/~obecker | \-------------------------------------------------------------------/ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
Current Thread |
---|
|
<- Previous | Index | Next -> |
---|---|---|
Check if XML tag exists?, David C Petite | Thread | Subtracting in XSL?, Ramon Mariano |
Re: matching nodes by their value, Robert Stupak | Date | Indexing Tree Elements, Lee Goddard |
Month |