Layers

Found following in context with handling larger number of layers (Tree or List):

http://www.rvantwisk.nl/librecad-irc-log/2012/november/27.html

What about use of tags?

Layers should be tagged with keywords, then these may be searched,
using name, date of creation, date of modification, tags; then further
modification of search (refine search); then option to display all, or selected. Take
appropriate action on selected layers.

layerID, layerName, dateCreated, dateModified, layerStatus,
layerAttributed, layerTags, thirdDimension

layerName needed not be a unique.

So we can have:

layerName = A1
layerTags = Floor 0, Furniture

layerName = A2
layerTags = Floor 0, Plumbing

layerName = A3
layerTags = Floor 0, Electric

layerName = B1
layerTags = Floor 1, Furniture

layerName = B2
layerTags = Floor 2, Plumbing

layerName = B3
layerTags = Floor 3, Electric

and many more such layers with much more tags.

Now one should have ability to select / filter layers on the basis of
tags, attributes, then able to show in a tree of hos choice.

Architect may want to see as:

 - Floor 0
 - - Pumbing
 - - Furntiure
 - - Electric
- Floor 1
 - - Pumbing
 - - Furntiure
 - - Electric
 - Floor 2
 - - Pumbing
 - - Furntiure
 - - Electric
 - Floor 3
 - - Pumbing
 - - Furntiure
 - - Electric

Some other professional (Cost Estimator) wish to see as:

- Pumbing
 - - Floor 0
 - - Floor 1
 - - Floor 2
 - - Floor 3
- Furntiure
 - - Floor 0
 - - Floor 1
 - - Floor 2
 - - Floor 3
- Electric
 - - Floor 0
 - - Floor 1
 - - Floor 2
 - - Floor 3

--
H.S.Rai