Information requirements for references.

(Last on March 31st, 2001)

Each reference requires the information which follows.

Field	Name	Size	Value	Description	Limits

1	Category	2	DR	Drawings
			CA	Construction Articles
			LA	Layout Articles
			SP	Station plans
			TR	Track plans
			IN	Indexes
			OA	Other Articles

2	Type	2	LO	Locomotives	Only with DR, CA and IN
			CO	Coaches	Only with DR, CA and IN
			WA	Wagons	Only with DR, CA and IN
			RC	Railcars	Only with DR, CA and IN
			TK	Track	Only with DR, CA and IN
			SI	Signals and Signal Boxes	Only with DR, CA and IN
			RV	Road Vehicles	Only with DR, CA and IN
			BU	Buildings	Only with DR, CA and IN
			MI	Miscellaneous	Only with DR, CA and IN
			EL	Electrical and Electronics	Only with OA
			PT	Painting	Only with OA
			WP	Workshop Practices	Only with OA
			SC	Scenic Work	Only with OA
			RO	Railway Operation	Only with OA
			LB	Layout Ideas	Only with OA
			DE	Detailing	Only with OA

3	Company	4	GWR	GWR and constituent parts	Up to 1948
			SR	SR and constituent parts	Up to 1948
			LMS	LMS and constituent parts	Up to 1948
			LNER	LNER and constituent parts	Up to1948
			BR	BR and constituent parts	1948 to 1993
			PBR	Post BR period	Post 1993
			IRE	Irish
			OTH	Private, Industrial, Miscellaneous
			FOR	Overseas	See note 1

4	Pre-Group	9		A refinement of company	See note 2

5	Wheels	9		Wheel arrangement	Locos only

6	Details	60		Sufficient information to search

7	Scale	9		The scale of the referenced material

8	Magazine	3		As per coverage	See note 3

9	Month	3		Number if not monthly	See note4

10	Year	4		Year of publication	See note5

Notes: