Added some explanation to convert.md

docs/src/cli_usage/convert.md

@@ -115,14 +115,29 @@ TBD
 
 ### From SHACL to ShEx
 
-A possible conversion among RDF data modelling technologies includes the conversion from a simple SHACL shapes graph to ShEx schemas.
-For users to do so, one can use the instructions below.
+It is possible to convert between a subset of SHACL shapes to ShEx schemas.
+As an example, the following command:
 
 ```sh
 rudof convert -m shacl -x shex -s simple_shacl.ttl -f turtle -o simple.shex
 ```
 
-> The converter only works for a subset of SHACL. We should still document what are the features supported and the features that are not yet supported but this is still work in progress.
+> The converter only works for a subset of SHACL. This is a work-in-progress feature and [the following issue](https://github.com/rudof-project/rudof/issues/127) is expected to document the subset of SHACL supported.
+
+### Specifying base IRI to handle relative IRIs
+
+If the RDF data contains relative IRIs, it is necessary to resolve them by specifying a base IRI. It can be done by providing a base declaration in the `rdf_data` entry of the configuration file. For example, assuming the configuration file contains `examples/config/data_config.yaml`
+
+```yaml
+rdf_data:
+  base: http://example.org/
+```
+
+it is possible to specify the conversion as:
+
+```sh
+rudof convert -m shacl -x shex -s simple_shacl.ttl -f turtle -o simple.shex -c examples/config/data_config.yml
+```
 
 ## From ShEx
 

examples/config/data_config.yml

@@ -0,0 +1,2 @@
+rdf_data:
+  base: http://example.org/

examples/config/shacl_config.yml

@@ -0,0 +1,2 @@
+rdf_data:
+  base: http://example.org/

rudof_cli/src/main.rs

@@ -1335,7 +1335,7 @@ where
 fn run_data(
     data: &Vec<InputSpec>,
     data_format: &DataFormat,
-    _debug: u8,
+    debug: u8,
     output: &Option<PathBuf>,
     result_format: &DataFormat,
     force_overwrite: bool,
@@ -1344,6 +1344,9 @@ fn run_data(
 ) -> Result<()> {
     let (mut writer, _color) = get_writer(output, force_overwrite)?;
     let mut rudof = Rudof::new(config);
+    if debug > 0 {
+        println!("Config: {config:?}")
+    }
     get_data_rudof(&mut rudof, data, data_format, &None, reader_mode, config)?;
     let format: RDFFormat = RDFFormat::from(*result_format);
     rudof.get_rdf_data().serialize(&format, &mut writer)?;