diff --git a/schema/schema_template.py b/schema/schema_template.py
index bc0f80e..8b635ff 100644
--- a/schema/schema_template.py
+++ b/schema/schema_template.py
@@ -12,7 +12,7 @@
 import enum
 
 from astrodbkit2.astrodb import Base
-from sqlalchemy import Column, DateTime, Float, ForeignKey, Integer, String
+from sqlalchemy import Column, DateTime, Float, ForeignKey, Integer, String, Boolean
 from sqlalchemy.orm import validates
 
 # Globals
@@ -338,4 +338,65 @@ def validate_comments(self, key, value):
         check_string_length(value, DESCRIPTION_STRING_LENGTH, key)
         return value
 
+class Parallax(Base):
+    # This is an example of a measurement table (see below, commented-out table as another example)
+
+    __tablename__ = 'Parallax'
+    source = Column(
+        String(100),
+        ForeignKey("Sources.source", ondelete="cascade", onupdate="cascade"),
+        nullable=False,
+        primary_key=True,
+    )
+
+    # always note units, following the practices of Chen et al. 2022.
+    parallax_mas = Column(Float, nullable=False)
+
+    parallax_error = Column(Float) # todo: make asymmetric errors
+    adopted = Column(Boolean)  # flag for indicating if this is the adopted
+    comments = Column(String(1000))
+    reference = Column(
+        String(30),
+        ForeignKey("Publications.reference", onupdate="cascade"),
+        primary_key=True,
+    )
+
+    @validates("comment")
+    def validate_comment_length(self, key, value):
+        check_string_length(value, 1000, key)
+        return value
+
+# class Measurement(Base):
+#     # This is a template table that you can fill in with your own measurement.
+#     . This is a placeholder for a table that would store measurements such as parallax.
+#
+#     __tablename__ = 'Measurement'
+#     source = Column(
+#         String(100),
+#         ForeignKey("Sources.source", ondelete="cascade", onupdate="cascade"),
+#         nullable=False,
+#         primary_key=True,
+#     )
+#
+#     # units should be included in the column name.
+#     # e.g., for parallax measured in milliarcseconds, this would read parallax_mas
+#     measurement = Column(Float, nullable=False)
+#
+#     measurement_error = Column(Float) # todo: make asymmetric errors
+#     adopted = Column(Boolean)  # flag for indicating if this is the adopted
+#     comments = Column(String(1000))
+#     reference = Column(
+#         String(30),
+#         ForeignKey("Publications.reference", onupdate="cascade"),
+#         primary_key=True,
+#     )
+#
+#     @validates("comment")
+#     def validate_comment_length(self, key, value):
+#         check_string_length(value, 1000, key)
+#         return value
+
+
+
+