diff --git a/README.md b/README.md
index 480168f..8e7e2af 100644
--- a/README.md
+++ b/README.md
@@ -5,8 +5,8 @@ etc. Objects inheriting from the `CO3` base class can then define data transform
 that connect to database components, and can be automatically collected for coordinated
 database insertion.
 
-`co3` attempts to provide a general interface for interacting with a storage media (e.g.,
-database, pickled objects, VSS framework, in-memory key-value stores, etc). The following
+`co3` attempts to provide a general interface for interacting with storage media (e.g.,
+databases, pickled objects, VSS framework, in-memory key-value stores, etc). The following
 top-level classes capture the bulk of the operational model:
 
 - **Database**: reference to a storage medium, with an `Accessor` for accessing data,
diff --git a/co3/engine.py b/_deprecated/engine.py
similarity index 97%
rename from co3/engine.py
rename to _deprecated/engine.py
index ff27a49..2d25ef4 100644
--- a/co3/engine.py
+++ b/_deprecated/engine.py
@@ -13,7 +13,7 @@ class Engine:
     derivative Engines, like SQLEngine, mostly just wrap another engine-like object, this
     is not the rule. That is, inheriting Engine subtypes shouldn't necessarily expect to
     rely on another object per se, and if such an object is required, _this_ is the class
-    is meant to be skeleton to supports its creation (and not merely a wrapper for some
+    meant to be the skeleton that supports its creation (and not merely a wrapper for some
     other type, although it may appear that way when such a type is in fact readily
     available).
 
diff --git a/co3/component.py b/co3/component.py
index a75aba0..8ddcbb8 100644
--- a/co3/component.py
+++ b/co3/component.py
@@ -1,12 +1,11 @@
-'''
-Component
-
-General wrapper for storage components to be used in various database contexts. Relations
-can be thought of generally as named data containers/entities serving as a fundamental
-abstractions within particular storage protocols.
-'''
-
 class Component[T]:
+    '''
+    Component
+
+    General wrapper for storage components to be used in various database contexts. Relations
+    can be thought of generally as named data containers/entities serving as a fundamental
+    abstractions within particular storage protocols.
+    '''
     def __init__(self, name, obj: T):
         self.name = name
         self.obj  = obj
@@ -19,4 +18,3 @@ class Component[T]:
 
     def get_attributes(self):
         raise NotImplementedError
-
diff --git a/co3/domain.py b/co3/domain.py
new file mode 100644
index 0000000..4caeb41
--- /dev/null
+++ b/co3/domain.py
@@ -0,0 +1,24 @@
+from contextlib import contextmanager
+
+from co3 import Resource
+
+
+class Domain[R: Resource]:
+    '''
+    General Domain class
+
+
+    '''
+    def __init__(self, content):
+        pass
+    
+    def get_resource(self, url: URL) -> Resource:
+        pass
+
+    @contextmanager
+    def connect(self, timeout=None):
+        raise NotImplementedError
+
+class SelectableDomain(Domain):
+    def select(self, component, *args, **kwargs):
+        raise NotImplementedError
diff --git a/co3/resources/disk.py b/co3/domains/__init__.py
similarity index 85%
rename from co3/resources/disk.py
rename to co3/domains/__init__.py
index 6fc1f15..33dde73 100644
--- a/co3/resources/disk.py
+++ b/co3/domains/__init__.py
@@ -1,10 +1,12 @@
+#from co3.resources.disk import DiskResource
+
 from pathlib import Path
 
 from co3.util import paths
-from co3.resource import SelectableResource
+from co3.resource import SelectableDomain
 
 
-class DiskResource(SelectableResource):
+class DiskDomain(SelectableDomain):
     def select(
         self,
         path_list: str | Path | list[str | Path],
diff --git a/co3/domains/disk.py b/co3/domains/disk.py
new file mode 100644
index 0000000..e69de29
diff --git a/co3/managers/sql.py b/co3/managers/sql.py
index 8fd4519..86b85c7 100644
--- a/co3/managers/sql.py
+++ b/co3/managers/sql.py
@@ -75,7 +75,7 @@ class SQLManager(RelationalManager[SQLTable]):
     '''
     def __init__(self, *args, **kwargs):
         '''
-        The insert lock is a *reentrant lock*, meaning the same thread can acquire the
+        The insert lock is a *re-entrant lock*, meaning the same thread can acquire the
         lock again without deadlocking (simplifying across methods of this class that
         need it).
         '''
@@ -112,11 +112,13 @@ class SQLManager(RelationalManager[SQLTable]):
     def insert(
         self,
         connection,
-        component,
+        component: SQLTable,
         inserts: list[dict],
         commit=True
     ):
         '''
+        Insert a group of 
+
         Parameters:
         '''
         with self._insert_lock:
@@ -135,6 +137,13 @@ class SQLManager(RelationalManager[SQLTable]):
         Perform provided table inserts, aligning the insert format of
         ``Collector.collect_inserts()``.
 
+        Note that the regular ``insert`` actually supports the usual notion of a "bulk
+        insert," inserting many entries under a single table. This method simply supports
+        the same but across multiple tables. It does so by just making calls to
+        ``insert()`` after grouping entries for each component in the provided ``inserts``
+        dict, only committing the transaction after all components inserts have been
+        staged.
+
         Parameters:
             inserts: component-indexed dictionary of insert lists
         '''
diff --git a/co3/medium.py b/co3/medium.py
new file mode 100644
index 0000000..5932500
--- /dev/null
+++ b/co3/medium.py
@@ -0,0 +1,58 @@
+import logging
+from contextlib import contextmanager
+
+
+logger = logging.getLogger(__name__)
+
+class Medium[R: Resource]:
+    '''
+    Medium base class. 
+
+    A Resource space
+    '''
+    def __init__(self, scope):
+        pass
+        
+    @contextmanager
+    def connect(self, timeout=None):
+        '''
+        Open a connection to the database specified by the resource. Exactly what the
+        returned connection looks like remains relatively unconstrained given the wide
+        variety of possible database interactions. This function should be invoked in
+        with-statement contexts, constituting an "interaction session" with the database
+        (i.e., allowing several actions to be performed using the same connection).
+        '''
+        raise NotImplementedError
+
+    def execute(self, query: Query[QL]):
+        pass
+
+
+class BrowsableMedium[R: Resource](Medium[R]):
+    def browse(self, uri: URI[R]):
+        '''
+        Analog for Read (CRUD), SELECT (SQL), GET (REST)
+        '''
+        pass
+
+
+class ABCDMedium[R: Resource](BrowsableMedium[R]):
+    def append(self, uri: URI[R], resource: R):
+        '''
+        Analog for Create (CRUD), INSERT (SQL), POST/PUT (REST)
+        '''
+        pass
+
+    def change(self, uri: URI[R], resource: R):
+        '''
+        Analog for Update (CRUD), UPDATE (SQL), PUT/PATCH (REST)
+
+        Can a URI be another object? Component for ex; could inherit from URI I guess
+        '''
+        pass
+
+    def delete(self, uri: URI[R]):
+        '''
+        Analog for Delete (CRUD), DELETE (SQL), DELETE (REST)
+        '''
+        pass
diff --git a/co3/resource.py b/co3/resource.py
index 290aff0..abb6bb7 100644
--- a/co3/resource.py
+++ b/co3/resource.py
@@ -2,7 +2,8 @@ from typing import Protocol
 
 
 class Resource:
-    pass
+    def content(self) -> BinaryIO:
+        pass
 
 class SelectableResource(Protocol):
     def select(self, component, *args, **kwargs):
diff --git a/co3/resources/__init__.py b/co3/resources/__init__.py
index b7ebad3..e69de29 100644
--- a/co3/resources/__init__.py
+++ b/co3/resources/__init__.py
@@ -1 +0,0 @@
-from co3.resources.disk import DiskResource
diff --git a/co3/uri.py b/co3/uri.py
new file mode 100644
index 0000000..e908149
--- /dev/null
+++ b/co3/uri.py
@@ -0,0 +1,15 @@
+from urllib import parse
+
+
+class URI:
+    def __init__(self, url_str: str):
+        self.url_str = url_str
+
+class URL(URI):
+    def __init__(self, url_str: str):
+        self.url_str = url_str
+
+class URN(URI):
+    def __init__(self, url_str: str):
+        self.url_str = url_str
+
diff --git a/pyproject.toml b/pyproject.toml
index 780bb05..c011c35 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,6 +40,7 @@ docs = [
     "furo",
     "myst-parser",
 ]
+jupyter = ["ipykernel"]
 
 [project.urls]
 Homepage = "https://doc.olog.io/co3"