diff --git a/contentctl/input/director.py b/contentctl/input/director.py
index 1b637101..993296e2 100644
--- a/contentctl/input/director.py
+++ b/contentctl/input/director.py
@@ -255,6 +255,23 @@ def createSecurityContent(self, contentType: SecurityContentType) -> None:
             end="",
             flush=True,
         )
+        if contentType == SecurityContentType.data_sources:
+            # After resolving all data_sources, we need to complete mappings 
+            # that can ONLY be done after all data_sources have been parsed. 
+            # This is because datasources may reference each other 
+            # and we cannot resolve those references until all data sources have been parsed.
+            for ds in self.output_dto.data_sources:
+                try:
+                    ds.resolveDataSourceObject(self.output_dto)
+                except (ValidationError, ValueError) as e:
+                    if ds.file_path is None:
+                        validation_errors.append((relative_path, ValueError(f"File path for DataSource {ds.name} was None.")))
+                        validation_errors.append((Path("PATH_NOT_FOUND"), e))
+                    else:    
+                        relative_path = ds.file_path.absolute().relative_to(
+                            self.input_dto.path.absolute()
+                        )
+                        validation_errors.append((relative_path, e))
         print("Done!")
 
         if len(validation_errors) > 0:
diff --git a/contentctl/objects/data_source.py b/contentctl/objects/data_source.py
index ada9ad33..86dab457 100644
--- a/contentctl/objects/data_source.py
+++ b/contentctl/objects/data_source.py
@@ -1,29 +1,71 @@
 from __future__ import annotations
+from typing import Any, TYPE_CHECKING
+if TYPE_CHECKING:
+    from contentctl.input.director import DirectorOutputDto
 
-from typing import Any, Optional
+from enum import StrEnum, auto
 
-from pydantic import BaseModel, Field, HttpUrl, model_serializer
+
+from pydantic import BaseModel, Field, HttpUrl, model_serializer, ConfigDict, computed_field
+from functools import cached_property
 
 from contentctl.objects.security_content_object import SecurityContentObject
 
 
 class TA(BaseModel):
+    model_config = ConfigDict(extra="forbid")
     name: str
-    url: HttpUrl | None = None
+    url: HttpUrl 
     version: str
 
 
+class DataSourceDataModel(StrEnum):
+    ocsf = auto()
+    custom_cim = auto()
+    cim = auto()
+
+
+class Field_Mapping(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+    data_model: DataSourceDataModel
+    data_set: str | None = None
+    mapping: dict[str, str]
+
+
+class LogConvert(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+    # This should really be a DataSource object, 
+    # but the order in which they are defined makes 
+    # this challenging. 
+    # We will need to keep both these fields around for now
+    data_source: str  
+    _data_source_object: DataSource | None = None
+    mapping: dict[str, str]
+
+    @computed_field
+    @cached_property    
+    def data_source_object(self)->DataSource:
+        if self._data_source_object is None:
+            raise ValueError(f"Error - LogConvert.data_source object {self.data_source} "
+                             "has not been resolved. Please ensure that 'configure_data_source_object' has been called")
+        return self._data_source_object
+
+    def resolveDataSourceObject(self, director: DirectorOutputDto | None )->None:
+        self._data_source_object = DataSource.mapNamesToSecurityContentObjects([self.data_source], director)[0]
+        
+
 class DataSource(SecurityContentObject):
+    model_config = ConfigDict(extra="forbid")
     source: str = Field(...)
     sourcetype: str = Field(...)
-    separator: Optional[str] = None
-    configuration: Optional[str] = None
-    supported_TA: list[TA] = []
-    fields: None | list = None
-    field_mappings: None | list = None
-    convert_to_log_source: None | list = None
+    separator: None | str = None
+    configuration: None | str = None
+    supported_TA: list[TA]
+    fields: list[str] = []
+    field_mappings: list[Field_Mapping] = []
+    convert_to_log_source: list[LogConvert] = []
     example_log: None | str = None
-    output_fields: list[str] = None
+    output_fields: list[str] = []
 
     @model_serializer
     def serialize_model(self):
@@ -48,3 +90,10 @@ def serialize_model(self):
 
         # return the model
         return super_fields
+
+    def resolveDataSourceObject(self, director: DirectorOutputDto | None )->None:
+        for index,log in enumerate(self.convert_to_log_source):
+            try:
+                log.resolveDataSourceObject(director)
+            except Exception as e:
+                raise ValueError(f"Error encountered when resolving field 'convert_to_log_source[{index}].data_source: {log.data_source}'. No DataSource by the name '{log.data_source}' exists")
\ No newline at end of file