Symbol field and metadata handling in 5.1

Version 5.1 introduced a new GUI that no longer closely resembles how
this information is stored in the files. This means the rules 6.2 and
6.3 no longer make sense to be separated. It also required updating of
screenshots.

Better highlighting of rule regarding aliases

content/klc/S6.2.adoc

@@ -1,9 +1,27 @@
 +++
-brief = "Component fields must be filled appropriately"
+brief = "Symbol and alias fields and metadata filled out as required"
 +++
 
 . *Reference* field is selected appropriately for the symbol and is _visible_
 . *Value* field contains the name of the symbol and is _visible_
-. *Footprint* field contains footprint link for atomic parts, and is empty for generic parts. It must be _invisible_
-. *Datasheet* field is left empty, and is _invisible_
-. The symbol contains no other custom fields
+. *Footprint* field contains footprint link for fully specified symbols and must be _invisible_
+.. The footprint field must be empty for generic symbols
+. *Datasheet* entry [1] is filled out, and is _invisible_
+. The symbol contains no other custom fields
+
+Additional documentation is provided via two other fields:
+[start=6]
+. **Description** field contains comma-separated device information
+.. For symbols with a default footprint, the simplified footprint name should be appended to the description e.g. `SOIC-8`
+.. Part name should not be duplicated in the description field
+. **Keywords** field contains space-separated keyword values. These values are used to assist in part searching and should not include filler words
+
+{{< klcimg src="symbol_metadata" title="Symbol metadata example" >}}
+
+**Aliases** define their own values for the datasheet link, description and keyword entries.
+
+{{< klcimg src="alias_metadata" title="Alias metadata example" >}}
+
+---
+
+_[1]: KiCad 5.x and earlier have two places to store the datasheet link. It can be in the `.lib` file once per symbol or in the `.dcm` file allowing different datasheets per alias. Having different datasheets for aliases only works if the `.lib` entry is left empty. The datasheet entry in the main symbol metadata view is linked to the dcm entry since version 5.1.x._

content/libraries/klc.adoc

@@ -13,7 +13,7 @@ aliases = [ "/klc/" ]
 toc::[]
 
 
-**link:/libraries/klc/history/[Revision: 3.0.24]**
+**link:/libraries/klc/history/[Revision: 3.0.25]**
 
 ---
 

content/libraries/klc_history.adoc

@@ -5,6 +5,9 @@ url = "/libraries/klc/history/"
 +++
 
 ---
+== 3.0.25 - 2019-10-06
+* Update section about symbol documentation to KiCad 5.1 GUI (combined S6.2 and S6.3)
+
 == 3.0.24 - 2019-11-16
 * Clarify rule for parts with toleranced dimensions
   * Fab comes from the nominal component dimensions (F5.2)