XQuery update examples

update.xql

(: insert attribute :)
for $i in collection('/db/apps/my-data')//nym[not(@cert)]
return 
    update insert attribute cert {'high'} into $i
    
(: insert more than one node :)
    update insert (<a/>, <b/>) into //foo
    
(: make sure to explicitly specify namespaces when inserting/replacing nodes :)
   update insert <surname xmlns="http://www.tei-c.org/ns/1.0">Huo</surname> into //tei:name[.='Otmar']
    
(: replace text content of an element :)    
declare namespace tei="http://www.tei-c.org/ns/1.0";
for $i in collection("/db/apps/my-data")//tei:m[@n="3"][.="τ"]
return update replace $i/text() with '(V)τ'

(: but better do the same with update VALUE :)
for $i in collection("/db/apps/my-data")//tei:m[@n="3"][.="τ"]
return update value $i with '(V)τ'

(: not only text content can be updated with update value :)
for $i in //name[. = "Otmar"]
 return update value $i with <forename>Oti</forename>
 
(: RENAME node :)
for $email in //email
 update rename $email as 'mail'