move GTOIntegralDecomposition to NumericalSettings

Author: EBB2675

src/nomad_simulations/schema_packages/numerical_settings.py

@@ -887,3 +887,25 @@ def __init__(self, m_def: 'Section' = None, m_context: 'Context' = None, **kwarg
 
     def normalize(self, archive: 'EntryArchive', logger: 'BoundLogger') -> None:
         super().normalize(archive, logger)
+
+
+class GTOIntegralDecomposition(NumericalSettings):
+    """
+    A general class for integral decomposition techniques for Coulomb and exchange integrals.
+    Examples:
+    Resolution of identity (RI-approximation):
+    RI
+    RIJK
+    ....
+    Chain-of-spheres (COSX) algorithm for exchange: doi:10.1016/j.chemphys.2008.10.036
+    """
+
+    approximation_type = Quantity(
+        type=str,
+        description="""
+        RIJ, RIK, RIJK,
+        """,
+    )
+
+    def normalize(self, archive: 'EntryArchive', logger: 'BoundLogger') -> None:
+        super().normalize(archive, logger)