Call for votes: Document description prefixes in Official Library Header Specification

[Travis Cobbs]

Please vote on the following change to the Official Library Header Specification:

Appendix VI
Programs relying on the parts.lst file rather then the LDRAW_ORG meta-statement use special characters to prevent the parts being included in the list:

• The descriptions of all subparts (i.e. line 4 = '0 !LDRAW_ORG Subpart') must start with '~'.
  
• The description of all obsolete parts, maintained for backwards compatibility must start with '~'.
  
• The descriptions of all aliases (i.e. line 4 = '0 !LDRAW_ORG Part Alias') must start with '='.
  
• The descriptions of all physical colour parts (i.e. line 4 = '0 !LDRAW_ORG Part Physical_Colour') should start with '_' .
  

The use of '~' for non "s\" part files is at the author's discretion, to hide mouldings that are not released independently. This is one case where merely reading the LDRAW_ORG line is insufficient for tools to know how to treat the file.