References in structured outputs

[jhammarstedt]

I'm trying different ways to represent sources in a nested pydantic model. Are there any good tips/best practices for this or anyway ADK would enable me to do this better?

There are a few examples:

1. Source as a separate field - (flat model but decouples the fields entierly):

class MyModel(BaseModel):
  my_fact_1: str = Field(description="Some facts")
  my_fact_1_source: str = Field(description="reference for my_fact_1")

2. Source and value as a model - (Nested but connected):

class ValueWithSource(BaseModel):
  value: str = Field(description="some facts")
  source: str = Field(description="reference for the value")

class MyModel(BaseModel):
  my_fact_1: ValueWithSource = Field(description="Some facts")

The second approach works but limits the type of configuration we can do on the field (as all other fields will share the model). Does anyone here have some input/experience here?