diff --git a/dbt_semantic_interfaces/protocols/project_configuration.py b/dbt_semantic_interfaces/protocols/project_configuration.py
index e2248bb3..b539deb6 100644
--- a/dbt_semantic_interfaces/protocols/project_configuration.py
+++ b/dbt_semantic_interfaces/protocols/project_configuration.py
@@ -18,6 +18,6 @@ def dsi_package_version(self) -> SemanticVersion:
 
     @property
     @abstractmethod
-    def time_spine_table_configurations(self) -> Sequence[TimeSpineTableConfiguration]:
+    def time_spines(self) -> Sequence[TimeSpineTableConfiguration]:
         """The time spine table configurations. Multiple allowed for different time grains."""
         pass
diff --git a/dbt_semantic_interfaces/protocols/time_spine_configuration.py b/dbt_semantic_interfaces/protocols/time_spine_configuration.py
index de0579a7..fcee7453 100644
--- a/dbt_semantic_interfaces/protocols/time_spine_configuration.py
+++ b/dbt_semantic_interfaces/protocols/time_spine_configuration.py
@@ -7,7 +7,7 @@
 class TimeSpineTableConfiguration(Protocol):
     """Describes the configuration for a time spine table.
 
-    A time spine table is a table with a single column containing dates at a specific grain.
+    A time spine table is a table with at least one column containing dates at a specific grain.
 
     e.g. with day granularity:
     ...
@@ -15,23 +15,31 @@ class TimeSpineTableConfiguration(Protocol):
     2020-01-02
     2020-01-03
     ...
-
-    The time spine table is used to join to the measure source to compute cumulative metrics.
     """
 
     @property
     @abstractmethod
-    def location(self) -> str:
-        """The location of the time spine table in schema_name.table_name format."""
+    def name(self) -> str:
+        """Name used to reference this time spine."""
         pass
 
     @property
     @abstractmethod
-    def column_name(self) -> str:
-        """The name of the column in the time spine table that has the date values."""
+    def model(self) -> str:
+        """dbt model that represents the time spine."""
+        pass
 
     @property
     @abstractmethod
-    def grain(self) -> TimeGranularity:
-        """The grain of the dates in the time spine table."""
+    def base_column(self) -> str:
+        """The name of the column in the time spine table that has the values at the base granularity."""
+        pass
+
+    @property
+    @abstractmethod
+    def base_granularity(self) -> TimeGranularity:
+        """The grain of the dates in the base_column.
+
+        Must map to one of the default TimeGranularity values, not a custom granularity.
+        """
         pass