diff --git a/lumen/base.py b/lumen/base.py
index 1e9bb5add..163a18f5a 100644
--- a/lumen/base.py
+++ b/lumen/base.py
@@ -49,6 +49,9 @@ class Component(param.Parameterized):
     # component specification
     _internal_params: ClassVar[List[str]] = ['name']
 
+    # Deprecated parameters that are still allowed as spec keys
+    _legacy_params: ClassVar[List[str]] = []
+
     # Keys that must be declared declared as a list of strings or
     # tuples of strings if one of multiple must be defined.
     _required_keys: ClassVar[List[str | Tuple[str, ...]]] = []
@@ -134,9 +137,10 @@ def _sync_refs(self, trigger: bool = True):
     @classproperty
     def _valid_keys_(cls) -> List[str] | None:
         if cls._valid_keys == 'params':
-            return [p for p in cls.param if p not in cls._internal_params]
+            valid = [p for p in cls.param if p not in cls._internal_params]
         else:
-            return cls._valid_keys
+            valid = cls._valid_keys
+        return valid if valid is None else valid + cls._legacy_params
 
     @classmethod
     def _validate_keys_(cls, spec: Dict[str, Any]):
@@ -451,7 +455,7 @@ def _valid_keys_(cls) -> List[str | Tuple[str, ...]] | None:
 
         if valid is not None and 'type' not in valid:
             valid.append('type')
-        return valid
+        return valid if valid is None else valid + cls._legacy_params
 
     @classproperty
     def _base_type(cls):
diff --git a/lumen/filters/base.py b/lumen/filters/base.py
index 535739f10..af8b6d2c5 100644
--- a/lumen/filters/base.py
+++ b/lumen/filters/base.py
@@ -7,7 +7,7 @@
 import types
 
 from typing import (
-    TYPE_CHECKING, Any, Callable, ClassVar, Dict, List, Tuple, Type,
+    TYPE_CHECKING, Any, Callable, ClassVar, Dict, List, Literal, Tuple, Type,
 )
 
 import bokeh  # type: ignore
@@ -60,6 +60,7 @@ class Filter(MultiTypeComponent):
     # Specification configuration
     _internal_params: ClassVar[List[str]] = ['name', 'schema']
     _requires_field: ClassVar[bool] = True
+    _valid_keys: ClassVar[List[str] | Literal['params'] | None] = 'params'
 
     def __init__(self, **params):
         super().__init__(**params)
diff --git a/lumen/layout.py b/lumen/layout.py
index c8b060a2c..49a916bb3 100644
--- a/lumen/layout.py
+++ b/lumen/layout.py
@@ -264,8 +264,9 @@ class Facet(Component):
     sort = param.ListSelector(default=[], objects=[], doc="""
         List of fields to sort by.""")
 
-    _valid_keys: ClassVar[Literal['params']] = 'params'
+    # Validation attributes
     _required_keys: ClassVar[List[str | Tuple[str, ...]]] = ['by']
+    _valid_keys: ClassVar[Literal['params']] = 'params'
 
     def __init__(self, **params):
         super().__init__(**params)
@@ -492,8 +493,9 @@ class Layout(Component, Viewer):
 
     _header_format: ClassVar[str] = '<div style="font-size: 1.5em; font-weight: bold;">{header}</div>'
 
+    # Validation attributes
+    _legacy_params: ClassVar[List[str]] = ['table']
     _required_keys: ClassVar[List[str | Tuple[str, ...]]] = ['title', 'views']
-
     _valid_keys: ClassVar[List[str]] = [
         'config', 'facet_layout', 'sort', # Deprecated
         'layout', 'refresh_rate', 'reloadable', 'show_title', 'title', 'tsformat', 'description', # Simple
diff --git a/lumen/pipeline.py b/lumen/pipeline.py
index 7ec09de16..e1c6cbd4a 100644
--- a/lumen/pipeline.py
+++ b/lumen/pipeline.py
@@ -145,6 +145,7 @@ class Pipeline(Viewer, Component):
 
     _internal_params: ClassVar[List[str]] = ['data', 'name', 'schema', '_stale']
     _required_fields: ClassVar[List[str | Tuple[str, str]]] = [('source', 'pipeline')]
+    _valid_keys: ClassVar[List[str] | Literal['params'] | None] = 'params'
 
     def __init__(self, *, source, table, **params):
         if 'schema' not in params:
diff --git a/lumen/sources/base.py b/lumen/sources/base.py
index a31cf81a4..00b8403f0 100644
--- a/lumen/sources/base.py
+++ b/lumen/sources/base.py
@@ -14,7 +14,7 @@
 from os.path import basename
 from pathlib import Path
 from typing import (
-    TYPE_CHECKING, Any, ClassVar, Dict, List, Tuple, Type, Union,
+    TYPE_CHECKING, Any, ClassVar, Dict, List, Literal, Tuple, Type, Union,
 )
 from urllib.parse import quote, urlparse
 
@@ -170,6 +170,9 @@ class Source(MultiTypeComponent):
     # Declare whether source supports SQL transforms
     _supports_sql: ClassVar[bool] = False
 
+    # Valid keys incude all parameters (except _internal_params)
+    _valid_keys: ClassVar[List[str] | Literal['params'] | None] = 'params'
+
     @property
     def _reload_params(self) -> List[str]:
         "List of parameters that trigger a data reload."
diff --git a/lumen/tests/sample_dashboard/dashboard.yaml b/lumen/tests/sample_dashboard/dashboard.yaml
index fadeb370e..a3fdf4599 100644
--- a/lumen/tests/sample_dashboard/dashboard.yaml
+++ b/lumen/tests/sample_dashboard/dashboard.yaml
@@ -1,7 +1,7 @@
 sources:
   test:
     type: 'file'
-    files: ['../sources/test.csv']
+    tables: ['../sources/test.csv']
 pipelines:
   test:
     source: test
diff --git a/lumen/tests/sample_dashboard/dashboard_legacy.yaml b/lumen/tests/sample_dashboard/dashboard_legacy.yaml
index 065d31d61..b0718900f 100644
--- a/lumen/tests/sample_dashboard/dashboard_legacy.yaml
+++ b/lumen/tests/sample_dashboard/dashboard_legacy.yaml
@@ -1,7 +1,7 @@
 sources:
   test:
     type: 'file'
-    files: ['../sources/test.csv']
+    tables: ['../sources/test.csv']
 targets:
   - title: "Test"
     source: test
diff --git a/lumen/tests/sample_dashboard/sync_query.yaml b/lumen/tests/sample_dashboard/sync_query.yaml
index 2e7dab85e..378cc580d 100644
--- a/lumen/tests/sample_dashboard/sync_query.yaml
+++ b/lumen/tests/sample_dashboard/sync_query.yaml
@@ -4,7 +4,7 @@ config:
 sources:
   test:
     type: 'file'
-    files: ['../sources/test.csv']
+    tables: ['../sources/test.csv']
 targets:
   - title: "Test 1"
     source: test
diff --git a/lumen/tests/sample_dashboard/sync_query_filters.yaml b/lumen/tests/sample_dashboard/sync_query_filters.yaml
index 6a7b6d270..b1eb3fa0c 100644
--- a/lumen/tests/sample_dashboard/sync_query_filters.yaml
+++ b/lumen/tests/sample_dashboard/sync_query_filters.yaml
@@ -3,7 +3,7 @@ config:
 sources:
   test:
     type: 'file'
-    files: ['../sources/test.csv']
+    tables: ['../sources/test.csv']
 targets:
   - title: "Test"
     source: test
diff --git a/lumen/tests/sample_dashboard/sync_query_filters_default.yaml b/lumen/tests/sample_dashboard/sync_query_filters_default.yaml
index 8ea7a15ff..5920e898d 100644
--- a/lumen/tests/sample_dashboard/sync_query_filters_default.yaml
+++ b/lumen/tests/sample_dashboard/sync_query_filters_default.yaml
@@ -3,7 +3,7 @@ config:
 sources:
   test:
     type: 'file'
-    files: ['../sources/test.csv']
+    tables: ['../sources/test.csv']
 targets:
   - title: "Test"
     source: test
diff --git a/lumen/tests/sample_dashboard/transform_variable.yaml b/lumen/tests/sample_dashboard/transform_variable.yaml
index 897da41a0..dbe5d0846 100644
--- a/lumen/tests/sample_dashboard/transform_variable.yaml
+++ b/lumen/tests/sample_dashboard/transform_variable.yaml
@@ -5,7 +5,7 @@ variables:
 sources:
   test:
     type: 'file'
-    files: ['../sources/test.csv']
+    tables: ['../sources/test.csv']
     kwargs:
       parse_dates: ['D']
 targets:
diff --git a/lumen/tests/test_dashboard.py b/lumen/tests/test_dashboard.py
index 29bec53ef..d6e5717ff 100644
--- a/lumen/tests/test_dashboard.py
+++ b/lumen/tests/test_dashboard.py
@@ -33,7 +33,7 @@ def test_dashboard_with_local_view_legacy(set_root):
 def test_dashboard_from_spec():
     spec = {
         'sources': {
-            'test': {'type': 'file', 'files': ['./sources/test.csv']}
+            'test': {'type': 'file', 'tables': ['./sources/test.csv']}
         },
         'layouts': [{
             'title': 'Test',
diff --git a/lumen/tests/validation/test_filters.py b/lumen/tests/validation/test_filters.py
index cc6cfe0b9..691baa0d0 100644
--- a/lumen/tests/validation/test_filters.py
+++ b/lumen/tests/validation/test_filters.py
@@ -20,7 +20,7 @@
             "The ConstantFilter component requires 'field' parameter to be defined",
         ),
         (
-            {"type": "widget", "fields": "island"},
+            {"type": "widget"},
             "The WidgetFilter component requires 'field' parameter to be defined",
         ),
         (
@@ -41,3 +41,8 @@ def test_filter_Filter(spec, msg):
     else:
         with pytest.raises(ValidationError, match=msg):
             Filter.validate(spec)
+
+
+def test_filter_key_validation():
+    with pytest.raises(ValidationError, match="ConstantFilter component specification contained unknown key 'feld'"):
+        Filter.validate({'type': 'constant', 'feld': 'foo'})
diff --git a/lumen/tests/validation/test_layout.py b/lumen/tests/validation/test_layout.py
index dc3f20a00..b3f266dd4 100644
--- a/lumen/tests/validation/test_layout.py
+++ b/lumen/tests/validation/test_layout.py
@@ -104,3 +104,8 @@ def test_layout_Layout(spec, msg):
     else:
         with pytest.raises(ValidationError, match=msg):
             Layout.validate(spec, context)
+
+
+def test_layout_key_validation():
+    with pytest.raises(ValidationError, match="Layout component specification contained unknown key 'src'"):
+        Layout.validate({'title': 'Table', 'src': 'penguins'})
diff --git a/lumen/tests/validation/test_pipeline.py b/lumen/tests/validation/test_pipeline.py
index c765e7a81..648aa4700 100644
--- a/lumen/tests/validation/test_pipeline.py
+++ b/lumen/tests/validation/test_pipeline.py
@@ -51,7 +51,7 @@
         ),
         (
             {"type": "file", "tables": {"penguins": "url.csv"}},
-            [{"type": "widget", "fields": "species"}],
+            [{"type": "widget"}],
             [{"type": "aggregate", "method": "mean", "by": ["species", "sex", "year"]}],
             "The WidgetFilter component requires 'field' parameter to be defined",
         ),
@@ -100,3 +100,8 @@ def test_pipeline_Pipeline(source, filters, transforms, msg):
     else:
         with pytest.raises(ValidationError, match=msg):
             Pipeline.validate(spec)
+
+
+def test_pipeline_key_validation():
+    with pytest.raises(ValidationError, match="Pipeline component specification contained unknown key 'transfomers'"):
+        Pipeline.validate({'source': None, 'transfomers': []})
diff --git a/lumen/tests/validation/test_sources.py b/lumen/tests/validation/test_sources.py
index d727be710..208546640 100644
--- a/lumen/tests/validation/test_sources.py
+++ b/lumen/tests/validation/test_sources.py
@@ -57,3 +57,8 @@ def test_source_Source(spec, context, msg):
     else:
         with pytest.raises(ValidationError, match=msg):
             Source.validate(spec, context)
+
+
+def test_source_key_validation():
+    with pytest.raises(ValidationError, match="FileSource component specification contained unknown key 'tablas'"):
+        Source.validate({'type': 'file', 'tablas': {}})
diff --git a/lumen/tests/validation/test_transform.py b/lumen/tests/validation/test_transform.py
index 105129f4f..e4d080e90 100644
--- a/lumen/tests/validation/test_transform.py
+++ b/lumen/tests/validation/test_transform.py
@@ -29,3 +29,7 @@ def test_transforms_Transform(spec, msg):
     else:
         with pytest.raises(ValidationError, match=msg):
             Transform.validate(spec)
+
+def test_transform_key_validation():
+    with pytest.raises(ValidationError, match="Iloc component specification contained unknown key 'strt'"):
+        Transform.validate({'type': 'iloc', 'strt': 3})
diff --git a/lumen/tests/validation/test_views.py b/lumen/tests/validation/test_views.py
index 31ef41836..164cb84fd 100644
--- a/lumen/tests/validation/test_views.py
+++ b/lumen/tests/validation/test_views.py
@@ -16,7 +16,7 @@
             {"format": "csv", "type": "default"},
         ),
         (
-            {"formats": "csv"},
+            {},
             "The Download component requires 'format' parameter to be defined",
         ),
         (
@@ -46,7 +46,7 @@ def test_target_Download(spec, output):
             None,
         ),
         (
-            {"type": "download", "formats": "csv"},
+            {"type": "download"},
             "The DownloadView component requires 'format' parameter to be defined",
         ),
         (
@@ -71,3 +71,8 @@ def test_target_View(spec, msg):
     else:
         with pytest.raises(ValidationError, match=msg):
             View.validate(spec)
+
+
+def test_filter_key_validation():
+    with pytest.raises(ValidationError, match="Table component specification contained unknown key 'feld'"):
+        View.validate({'type': 'table', 'feld': 'foo'})
diff --git a/lumen/transforms/base.py b/lumen/transforms/base.py
index 04e3cf919..39768877d 100644
--- a/lumen/transforms/base.py
+++ b/lumen/transforms/base.py
@@ -7,7 +7,7 @@
 import hashlib
 
 from typing import (
-    TYPE_CHECKING, Any, Callable, ClassVar, Dict, List, Tuple, Union,
+    TYPE_CHECKING, Any, Callable, ClassVar, Dict, List, Literal, Tuple, Union,
 )
 
 import numpy as np
@@ -43,6 +43,8 @@ class Transform(MultiTypeComponent):
 
     _field_params: ClassVar[List[str]] = []
 
+    _valid_keys: ClassVar[List[str] | Literal['params'] | None] = 'params'
+
     __abstract = True
 
     @classmethod
diff --git a/lumen/views/base.py b/lumen/views/base.py
index c39ecc697..b32e00d78 100644
--- a/lumen/views/base.py
+++ b/lumen/views/base.py
@@ -8,7 +8,7 @@
 
 from io import BytesIO, StringIO
 from typing import (
-    IO, TYPE_CHECKING, Any, ClassVar, Dict, List, Type,
+    IO, TYPE_CHECKING, Any, ClassVar, Dict, List, Literal, Type,
 )
 from weakref import WeakKeyDictionary
 
@@ -96,13 +96,22 @@ class View(MultiTypeComponent, Viewer):
     # Parameters which reference fields in the table
     _field_params: ClassVar[List[str]] = ['field']
 
+    # Optionally declares the Panel types used to render this View
+    _panel_type: ClassVar[Type[Viewable] | None] = None
+
+    # Whether this View can be rendered without a data source
     _requires_source: ClassVar[bool] = True
 
+    # Internal cache of link_selections objects
     _selections: ClassVar[WeakKeyDictionary[Document, link_selections]] = WeakKeyDictionary()
 
+    # Whether this source supports linked selections
     _supports_selections: ClassVar[bool] = False
 
-    _panel_type: ClassVar[Type[Viewable] | None] = None
+    # Validation attributes
+    _internal_params: ClassVar[List[str]] = ['name', 'rerender']
+    _legacy_params: ClassVar[List[str]] = ['sql_transforms', 'source', 'table', 'transforms']
+    _valid_keys: ClassVar[List[str] | Literal['params'] | None] = 'params'
 
     __abstract = True