Comments (3)
jcklie
commented on June 4, 2024
@reckart What is the difference between a view and a sofa?
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reckart
commented on June 4, 2024
@rentier good question. A CAS may contain multiple SofAs - each representing one text or other piece of primary data which is being annotated. When interacting with a CAS, one usually interacts with a "view" of the CAS which has a single SofA and which indexes all annotations that annotate this SofA. Annotations are a subtype of "feature structures". The SofA itself is a "feature structure". Annotations can only be indexed in one view and are always bound to a SofA. I believe feature structures could in theory be indexed in multiple views and they are not bound to a particular SofA.
I recommend reading these papers:
- Design and implementation of the UIMA common analysis system
- An Effective, Java-Friendly Interface to the CAS
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jcklie
commented on June 4, 2024
Still needs documentation
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Related Issues (20)
- Missing sofa references are not checked and produce invalid XMIs
- while serializing CAS to xmi: AttributeError: 'str' object has no attribute 'elements' HOT 8
- cassis 0.7.3
- Error parsing certain JSONs with embedded type system
- Use a cache for typesystem.is_instance_of() HOT 3
- GitHub Actions builds do not run due to missing Python version
- Merging type systems breaks consistency
- Unable to rely on a feature of a custom layer for annotation HOT 3
- Cas.add() should be able to accept multiple feature structures HOT 1
- Cannot deserialize from JSON Cas if child type comes before super type
- uima.tcas.DocumentAnnotation not predefined when deserializing from JSON HOT 3
- Function to rename Views
- JSON CAS parsing does not handle DocumentAnnotation properly
- Types with array range break JSON typesystem parsing
- Allow reading JSON CASes with out-of-order SofaFSes
- Specific type of array elements in element FS is not retained
- Can not add annotations to characters not right next to punctuation marks for Chinese HOT 2
- Relation creation between two entities HOT 2
- Speed up load_cas_from_xmi by improving offset_mapping and sofaString setter HOT 1
- When a type cannot be found try suggesting another type with a similar name
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