The scenario
An organization needs to understand the core object model of a PDF processing library for maintaining or extending its functionality.
What is in this drawing
Read the decisions behind it.
01
Used composition to show PDFDocument contains multiple PDFPage
02
Modeled PDF objects with inheritance from abstract COSBase
03
Distinguished between stream and dictionary as per PDF specification
When developing a PDF parsing or rendering library, this class diagram clarifies the relationships between core object types.
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