afs commented on issue #3180:
URL: https://github.com/apache/jena/issues/3180#issuecomment-2862534844
Hi @AndreasMeier12
When a URI has `%7C` in it, it really is those three characters, it is not
an escape mechanism, unlike `\u0041` or, in a string, `\n`. That step is
something the application must do.
`Resource.getLocalName()` returns the safest form - RDF/XML is the most
restrictive. `%` is not legal in an XML qname.
You get `mg` because (1) the split can not go across %7C (2) an XML qname
localname starts with a letter.
Jena has a utility class `SplitIRI` to split according to different policies.
```java
String x =
"resource:LOL-123.345.678-example-Quantity-ASDF%7C323-20-mg";
System.out.println("LN: "+SplitIRI.localname(x));
System.out.println("TTL: "+SplitIRI.localnameTTL(x));
System.out.println("XML: "+SplitIRI.localnameXML(x));
```
gives
```
LN: LOL-123.345.678-example-Quantity-ASDF%7C323-20-mg
TTL: LOL\-123.345.678\-example\-Quantity\-ASDF\%7C323\-20\-mg
XML: mg
```
The first is for display purposes.
The other two are for specific syntax use.
The grammar for IRIs:
https://www.w3.org/TR/rdf12-concepts/#iri-abnf
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