Question: In the context of 3GPP's Transparent end-to-end Packet-switched Streaming Service (PSS), what is the primary purpose of dividing the PSS base vocabulary into 'PssCommon', 'Streaming', and 'ThreeGPFileFormat' components?
Option 1: To segregate capabilities based on synchronization sources, such as streaming protocols (e.g., SP/P) and file formats (e.g., 3GP).
Option 2: To differentiate between video, audio, and text content types in PSS applications.
Option 3: To distinguish between HTTP-based and non-HTTP-based streaming services exclusively.
Option 4: To group all downloadable content (images, text, etc.) separately from streaming services.
Explanation: The division into 'PssCommon', 'Streaming', and 'ThreeGPFileFormat' components is motivated by the need to categorize different base applications based on their synchronization sources. For instance, pure streaming (synchronized by SP/P) is distinguished from 3GP file downloads (where synchronization is inherent in the file format). This segregation allows for a structured approach to defining capabilities within each application type, highlighting the importance of synchronization mechanisms in PSS.