Expanding DXF code list

hello world!

Is there any way to, well, expand DXF code list. I want to add some things to block but I don't want to add it by using attributes.

what I want to make is something like this

((-1 . <Entity name: 719e5b0>) (0 . "INSERT") (5 . "16F") (67 . 0) (8 . "0") (410 . "Model") (62 . 256) (6 . "ByLayer") (370 . -1) (347 . <Entity name: 0>) (284 . 0) (48 . 1.00000) (60 . 0) (66 . 1) (2 . "_LC_I_300_p") (10 -114652. -74554.7 0.000000) (41 . 20.3568) (42 . -25.0545) (43 . 1.00000) (50 . 0.000266536) (70 . 1) (71 . 1) (44 . 0.000000) (45 . 0.000000) (210 0.000000 0.000000 1.00000) [color="red"](4000 . "SOMETHING")[/color])

I tried with

(append (entget(car(entsel))) '((4998 . "SOMETHING")))

and I got

((-1 . <Entity name: 719e5b0>) (0 . "INSERT") (5 . "16F") (67 . 0) (8 . "0") (410 . "Model") (62 . 256) (6 . "ByLayer") (370 . -1) (347 . <Entity name: 0>) (284 . 0) (48 . 1.00000) (60 . 0) (66 . 1) (2 . "_LC_I_300_p") (10 -114652. -74554.7 0.000000) (41 . 20.3568) (42 . -25.0545) (43 . 1.00000) (50 . 0.000266536) (70 . 1) (71 . 1) (44 . 0.000000) (45 . 0.000000) (210 0.000000 0.000000 1.00000) (4998 . "SOMETHING"))

but when I checked it with

(setq a(entsel))   ;and select same block
(setq alist (entget(car a)))

I got only

((-1 . <Entity name: 719e5b0>) (0 . "INSERT") (5 . "16F") (67 . 0) (8 . "0") (410 . "Model") (62 . 256) (6 . "ByLayer") (370 . -1) (347 . <Entity name: 0>) (284 . 0) (48 . 1.00000) (60 . 0) (66 . 1) (2 . "_LC_I_300_p") (10 -114652. -74554.7 0.000000) (41 . 20.3568) (42 . -25.0545) (43 . 1.00000) (50 . 0.000266536) (70 . 1) (71 . 1) (44 . 0.000000) (45 . 0.000000) (210 0.000000 0.000000 1.00000))

Seems that you are looking to add some user data to entities, is this correct? Please check in this the extended data management in AutoLISP help. You will also need to register an application name for your data (APPID table).

Use xData, here is a tutorial:

http://www.afralisp.net/autolisp/tutorials/extended-entity-data-part-1.php

WOW! I expected some answers, but this is grate! Thank you very much! :D

You're very welcome Lukijan.

Depending on the quantity of data you need to store, you may also want to look into Dictionaries, as these have higher limits on the amount of data that may be stored.