Sequence ontology project

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Notes on the sequence ontology project:

Sequence Ontology Project Website

Format for GFF3 files

OBO foundry

Chado database

sequence ontology paper

SO is a directed acyclic graph (DAG),

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paper on AnnotationSketch

Quote from above paper:

Genome annotations are often provided in the GFF3 format (Stein,
2007) using the vocabulary of the Sequence Ontology (Eilbeck et al.,
2005). This format defines a directed acyclic graph (annotation
graph) with individual annotated entities (features) as nodes and
edges representing part_of relationships between them.

Chado paper

Sequence Ontology Browser