704998200 opened a new issue, #2102:
URL: https://github.com/apache/jena/issues/2102

   ### Version
   
   4.10
   
   ### Question
   
   This query works in Jena 3.16
   ```
   PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>  
   PREFIX brick:   <https://brickschema.org/schema/Brick#>  
   SELECT ?room  
   WHERE {       
   ?room brick:isPartOf 
<https://brickschema.org/schema/1.0.2/building_example#building:gtc/vavs/2/port[zn]>.
  
   }
   ```
   
![wechat_20231123110831](https://github.com/apache/jena/assets/49085215/dd2104c0-13a8-4ec4-8628-4df7f449883a)
   
   
   But throw an error in Jena 4.10
   ```[line: 5, col: 31] Bad IRI: 
'https://brickschema.org/schema/1.0.2/building_example#building:gtc/vavs/2/port[zn]':
 
<https://brickschema.org/schema/1.0.2/building_example#building:gtc/vavs/2/port[zn]>
 Code: 0/ILLEGAL_CHARACTER in FRAGMENT: The character violates the grammar 
rules for URIs/IRIs.```
   
   I know it's the problem of '[zn]'.
   
   I try to excape '[zn]',but it also throw an error
   ```
   PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>  
   PREFIX brick: <https://brickschema.org/schema/Brick#>  
   SELECT ?room  
   WHERE {     
      ?room brick:isPartOf 
<https://brickschema.org/schema/1.0.2/building_example#building:gtc/vavs/2/port\[zn\]>.
   }
   ```
   
   How can i fix it
   


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