diff options
Diffstat (limited to 'bsie/base/extractor.py')
| -rw-r--r-- | bsie/base/extractor.py | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/bsie/base/extractor.py b/bsie/base/extractor.py index 75b7173..bfa403c 100644 --- a/bsie/base/extractor.py +++ b/bsie/base/extractor.py @@ -20,7 +20,7 @@ __all__: typing.Sequence[str] = ( # constants # essential definitions typically used in extractor schemas. -# NOTE: The definition here is only for convenience; Each Extractor must implement its use, if so desired. +# NOTE: This preamble is only for convenience; Each Extractor must implement its use, if so desired. SCHEMA_PREAMBLE = ''' # common external prefixes prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> @@ -45,7 +45,12 @@ SCHEMA_PREAMBLE = ''' ## code ## class Extractor(abc.ABC): - """Produce (node, predicate, value)-triples from some content.""" + """Produce (subject, predicate, value)-triples from some content. + The Extractor produces princpal predicates that provide information + about the content itself (i.e., triples that include the subject), + and may also generate triples with auxiliary predicates if the + extracted value is a node itself. + """ # what type of content is expected (i.e. reader subclass). CONTENT_READER: typing.Optional[str] = None |