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K2 Edge Protocol Manual – document version 1.0 – Page 18

4.12. Sub command sg-select

Function: selects a previously preloaded scene graph waiting in the preload queue as the target for

incoming NRE commands.

field name

field type

value

cmd

mandatory nre

subcmd

mandatory

sg-select

exid

mandatory

External ID. Free format. See above.

rootfolder

mandatory

Path to channel pack as used in sg-preload, OR the reserved

keyword next.

If a path is specified, the scene graph preload queue is scanned for

a scene graph preloaded from exactly that path, and if found the

scene graph is (a) selected as the current target for incoming NRE

commands, and (b) removed from the preload queue.

If the keyword

is specified however, the scene graph waiting

at the front of the preload queue (if any) is (a) selected as the

current target for incoming NRE commands, and (b) removed from

the preload queue.

sg-inst

mandatory when path

is specified for

rootfolder field.

Unique scene graph instance ID as was specified with the

corresponding sg-preload sub command.

stm

optional Start time for the command in hh:mm:ss:ff timecode format. When

not specified, the command starts as soon as possible.

role

optional

Role field. See above. Note that only schedule roles are allowed

to use this sub command.

Notes:

• Please paragraph 4.7 for an explanation of selected and active scene graphs.

• Only a scene graph previously preloaded with sg-preload and still waiting in the preload queue

can be selected as the new target for incoming NRE commands.

• Once selected, the scene graph is removed from the preload queue, and thus cannot be selected

again without another sg-preload.

• Selecting a scene graph that cannot be found in the preload queue has no side effects.

Examples:

{cmd=nre; subcmd=sg-select;

rootfolder=/publitronic/objects/channelpack/music;

sg-inst=15; exid=4; stm=14:08:10:00;}

{cmd=nre; subcmd=sg-select; rootfolder=next; exid=5; stm=14:08:10:00;}

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