organising_data/Key-value-pairs.md

+# Key-value pairs
+
+Key-values are very powerful way to organise your data. 
+The allow for powerful searching of you data
+
+The simplest example is a key or attribute separated by a colon `:`, followed by a value.
+
+For example:
+
+```
+ dose : 100
+ time : 2 
+```
+
+
+There are 4 ways add key-value pairs:
+
+## 1. [Manually](./kv_add_manual)
+## 2. [Through the Description](./kv_add_global)
+## 3. [By filename convention](./kv_add_filename)
+## 4. [From .csv file](./kv_add_file)
+