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card.py

@@ -10,9 +10,23 @@ from .task import FormTask
 
 
 class TaskCard(Artifact):
+    """TaskCard delineates the phases in transforming the source dataset into a model-input, and specifies the metrics for evaluation of model-output.
+
+    Attributes:
+        loader: specifies the source address and the loading operator that can access that source and transform it into a unitxt multistream.
+
+        preprocess_steps: list of unitxt operators to process the data source into a model-input.
+
+        task: specifies the fields (of the already (pre)processed instance) making the inputs, the fields making the outputs, and the metrics to be used for evaluating the model output.
+
+        templates: format strings to be applied on the input fields (specified by the task) and the output fields. The templates also carry with them the list of postprocessing steps, to be applied to the model output.
+
+        instructions: as presented to the executor of the task.
+    """
+
     loader: Loader
-    task: FormTask
     preprocess_steps: List[StreamingOperator] = None
+    task: FormTask
     templates: Collection = None
     instructions: Collection = None
     sampler: Sampler = OptionalField(default_factory=RandomSampler)