diff --git a/src/decagon_pytorch/batch.py b/src/decagon_pytorch/batch.py
index e69de29..8be3fe6 100644
--- a/src/decagon_pytorch/batch.py
+++ b/src/decagon_pytorch/batch.py
@@ -0,0 +1,43 @@
+import scipy.sparse as sp
+
+
+class Batch(object):
+    def __init__(self, adjacency_matrix):
+        pass
+
+    def get(size):
+        pass
+
+
+def train_test_split(data, train_size=.8):
+    pass
+
+
+class Minibatch(object):
+    def __init__(self, data, node_type_row, node_type_column, size):
+        self.data = data
+        self.adjacency_matrix = data.get_adjacency_matrix(node_type_row, node_type_column)
+        self.size = size
+        self.order = np.random.permutation(adjacency_matrix.nnz)
+        self.count = 0
+
+    def reset(self):
+        self.count = 0
+        self.order = np.random.permutation(adjacency_matrix.nnz)
+
+    def __iter__(self):
+        adj_mat = self.adjacency_matrix
+        size = self.size
+        order = np.random.permutation(adj_mat.nnz)
+        for i in range(0, len(order), size):
+            row = adj_mat.row[i:i + size]
+            col = adj_mat.col[i:i + size]
+            data = adj_mat.data[i:i + size]
+            adj_mat_batch = sp.coo_matrix((data, (row, col)), shape=adj_mat.shape)
+            yield adj_mat_batch
+        degree = self.adjacency_matrix.sum(1)
+
+
+
+    def __len__(self):
+        pass
diff --git a/src/decagon_pytorch/data.py b/src/decagon_pytorch/data.py
index 736f558..3c62469 100644
--- a/src/decagon_pytorch/data.py
+++ b/src/decagon_pytorch/data.py
@@ -1,16 +1,36 @@
+from collections import defaultdict
+from .decode import BilinearDecoder
+from .weights import init_glorot
+
+
 class Data(object):
     def __init__(self):
         self.node_types = []
         self.relation_types = []
+        self.decoder_types = defaultdict(lambda: BilinearDecoder)
+        self.latent_node = []
 
-    def add_node_type(self, name):
+    def add_node_type(self, name, count, latent_length):
         self.node_types.append(name)
+        self.latent_node.append(init_glorot(count, latent_length))
 
     def add_relation(self, node_type_row, node_type_column, adjacency_matrix, name):
         n = len(self.node_types)
         if node_type_row >= n or node_type_column >= n:
             raise ValueError('Node type index out of bounds, add node type first')
         self.relation_types.append((node_type_row, node_type_column, adjacency_matrix, name))
+        _ = self.decoder_types[(node_type_row, node_type_column)]
+
+    def set_decoder_type(self, node_type_row, node_type_column, decoder_class):
+        if (node_type_row, node_type_column) not in self.decoder_types:
+            raise ValueError('Relation type not found, add relation first')
+        self.decoder_types[(node_type_row, node_type_column)] = decoder_class
+
+    def get_adjacency_matrices(self, node_type_row, node_type_column):
+        rels = list(filter(lambda a: a[0] == node_type_row and a[1] == node_type_column), self.relation_types)
+        if len(rels) == 0:
+
+
 
     def __repr__(self):
         n = len(self.node_types)
@@ -32,7 +52,7 @@ class Data(object):
                     continue
                 # dir = '<->' if i == j else '->'
                 dir = '--'
-                s += '  - ' + self.node_types[i] + ' ' + dir + ' ' + self.node_types[j] + ':\n'
+                s += '  - ' + self.node_types[i] + ' ' + dir + ' ' + self.node_types[j] + ' (' + self.decoder_types[(i, j)].__name__ + '):\n'
                 for r in rels:
                     s += '    - ' + r[3] + '\n'
         return s.strip()
diff --git a/tests/decagon_pytorch/test_data.py b/tests/decagon_pytorch/test_data.py
index b0c2b56..b37c14b 100644
--- a/tests/decagon_pytorch/test_data.py
+++ b/tests/decagon_pytorch/test_data.py
@@ -1,4 +1,5 @@
 from decagon_pytorch.data import Data
+from decagon_pytorch.decode import DEDICOMDecoder
 
 
 def test_data():
@@ -10,4 +11,5 @@ def test_data():
     d.add_relation(1, 1, None, 'Side Effect: Nausea')
     d.add_relation(1, 1, None, 'Side Effect: Infertility')
     d.add_relation(1, 1, None, 'Side Effect: Death')
+    d.set_decoder_type(1, 1, DEDICOMDecoder)
     print(d)