use schema and predicate types in extractors

1 files changed, 10 insertions, 3 deletions

diff --git a/bsie/base/errors.py b/bsie/base/errors.py
index f86ffb2..eedce3b 100644
--- a/bsie/base/errors.py
+++ b/bsie/base/errors.py
@@ -8,15 +8,22 @@ Author: Matthias Baumgartner, 2022
 import typing
 
 # exports
-__all__: typing.Sequence[str] = []
+__all__: typing.Sequence[str] = (
+    'ExtractorError',
+    )
+
+
 
 
 ## code ##
 
-class _BSIE_Error(Exception):
+class _BSIEError(Exception):
     """Generic BSIE error."""
 
-class ReaderError(_BSIE_Error):
+class ExtractorError(_BSIEError):
+    """The Extractor failed to process the given content."""
+
+class ReaderError(_BSIEError):
     """The Reader failed to read the given file."""
 
 ## EOF ##