From 82c119412d4328841bb7873e95de33476ee159d4 Mon Sep 17 00:00:00 2001
From: Diego Diaz <46930149+diegoalexdiaz@users.noreply.github.com>
Date: Tue, 9 Sep 2025 09:40:15 -0400
Subject: [PATCH] Proposed new length_ratio units to address scale-factors.

---
 System/Units.ecschema.xml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/System/Units.ecschema.xml b/System/Units.ecschema.xml
index b79847bc6..968b98c18 100644
--- a/System/Units.ecschema.xml
+++ b/System/Units.ecschema.xml
@@ -491,6 +491,9 @@
     <Unit typeName="DECIMAL_PERCENT" phenomenon="PERCENTAGE" unitSystem="INTERNATIONAL" definition="PERCENT" numerator="100" displayLabel="decimal percent" description="Unit suitable for storing a decimal number that represents an unspecified ratio." />
     <Unit typeName="PROBABILITY_FRACTION" phenomenon="PROBABILITY" unitSystem="SI" definition="ONE" displayLabel="" />
     <Unit typeName="PROBABILITY_PERCENT" phenomenon="PROBABILITY" unitSystem="INTERNATIONAL" definition="PROBABILITY_FRACTION" denominator="100" displayLabel="%" />
+    <Unit typeName="DECIMAL_LENGTH_RATIO" phenomenon="LENGTH_RATIO" unitSystem="INTERNATIONAL" definition="ONE" displayLabel="decimal length ratio" description="Unit suitable for storing a decimal number that represents a length ratio." />
+    <Unit typeName="M_PER_M_LENGTH_RATIO" phenomenon="LENGTH_RATIO" unitSystem="SI" definition="M*M(-1)" displayLabel="m:m" />
+    <Unit typeName="IN_PER_FT_LENGTH_RATIO" phenomenon="LENGTH_RATIO" unitSystem="USCUSTOM" definition="IN*FT(-1)" displayLabel="in:ft" />
     <Unit typeName="M_PER_M" phenomenon="SLOPE" unitSystem="SI" definition="M*M(-1)" displayLabel="m/m" />
     <Unit typeName="CM_PER_M" phenomenon="SLOPE" unitSystem="METRIC" definition="CM*M(-1)" displayLabel="cm/m" />
     <Unit typeName="MM_PER_M" phenomenon="SLOPE" unitSystem="METRIC" definition="MM*M(-1)" displayLabel="mm/m" />