[xsl] How to get a "heading" from an element

[Roger Chung-Wee <roger at chung-wee dot com>]

I'm having a real problem with something apparently simple. I can
extract from a database something like the following ...

<airline>
<airline-name>BWIA West Indies Airways</airline-name>
<airport-code>POS</airport-code>
<airport-name>Piarco International</airport-name>
</airline>

<airline>
<airline-name>BWIA West Indies Airways</airline-name>
<airport-code>BGI</airport-code>
<airport-name>Grantley Adams International</airport-name>
</airline>

<airline>
<airline-name>LIAT</airline-name>
<airport-code>ANU</airport-code>
<airport-name>V C Bird International</airport-name>
</airline>

<airline>
<airline-name>LIAT</airline-name>
<airport-code>BGI</airport-code>
<airport-name>Grantley Adams International</airport-name>
</airline>

... and would like to turn it into something like this:
<tr>
<td>BWIA West Indies Airways</td>
</tr>
<tr>
<td>POS</td>
<td>Piarco International</td>
</tr>
<tr>
<td>BGI</td>
<td>Grantley Adams International</td>
</tr>
<tr>
<td>LIAT</td>
</tr>
<tr>
<td>ANU</td>
<td>V C Bird International</td>
</tr>
<tr>
<td>BGI</td>
<td>Grantley Adams International</td>
</tr>

Thanks.

Roger.

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