<p dir="ltr">How about...</p>
<p dir="ltr">> non-denominational places (Airport chapels ...)</p>
<p dir="ltr">religion=all</p>
<p dir="ltr">> places shared between faiths</p>
<p dir="ltr">religion=multi<br>
Optionally more details with a scheme similar to:<br>
religion:<a href="http://taginfo.openstreetmap.org/tags/religion=christian">christian</a>=yes/*<br>
religion:<a href="http://taginfo.openstreetmap.org/tags/religion=muslim">muslim</a>=yes/*<br>
religion:<a href="http://taginfo.openstreetmap.org/tags/religion=buddhist">buddhist</a>=yes/*<br>
religion:<a href="http://taginfo.openstreetmap.org/tags/religion=hindu">hindu</a>=yes/*<br>
religion:<a href="http://taginfo.openstreetmap.org/tags/religion=jewish">jewish</a>=yes/*<br>
religion:<a href="http://taginfo.openstreetmap.org/tags/religion=shinto">shinto</a>=yes/*<br>
religion:<a href="http://taginfo.openstreetmap.org/tags/religion=taoist">taoist</a>=yes/*<br>
religion:<a href="http://taginfo.openstreetmap.org/tags/religion=sikh">sikh</a>=yes/*<br>
religion:*=*</p>