diff --git a/docs/quantity.md b/docs/quantity.md
index 2cfed0d8..88c5091f 100644
--- a/docs/quantity.md
+++ b/docs/quantity.md
@@ -1,29 +1,31 @@
 ---
 title: Quantity
+tags:
+- base
 ---
 
 # Quantity
 
 ## 1 Definition
 
-A [Property](../property) whose instances can be compared by ratio or only by order.
+[Property](../property) having a magnitude that can be expressed as a number from a continuous and contiguous range and a [Reference](../reference). 
 
 ### Notes 
 
 ### Examples 
 
 ### Sources
-- gEOGlos(VIM4 Notes omitted)
+- ISO/IEC Guide 99:2007, 1.1, modified – Notes omitted
 
 ___
 
 ## 2 Definition
 
-A [Property](../property) that has a magnitude that can be expressed as a number from a continuous and contiguous range and a [Reference](../reference). 
+[Property](../property) whose instances can be compared by ratio or only by order.
 
 ### Notes 
 
 ### Examples 
 
 ### Sources
-- ISO/IEC Guide 99:2007, 1.1, modified – Notes omitted
+- gEOGlos(VIM4 Notes omitted)