What meens the transition , what is it?

example largen radar good day klm1771 rolis 25n transition passing fl108for fl100

rolis tranition is waypoint ?

in that context, a transition is a subpart of a STAR procedure, to put it in simple terms

yes i will know it from sid or star

sorry i write incorectly , in route if i have sid kro1e from there is the transition
sid kroe1e have
from route LGAV/03L N0364F240 KRO1H KRO G33 NEVRA Z507 OSMOS OSMO1L LGTS/16 is the osmos1l or the from the sid kro1h the tranistion the sat the pilot to radars example
largen radar : dlh3910 cleared 25n transition expect ils runway 25r
cleared rolis 25n transition expect ols ils runway 25r decent fl100 to reach etaru, dlh3910 (transition is when you reach etaru waypoint descent to fl100)
see the sid photo and star to tell me

largen radar : dlh3910 cleared 25n transition expect ils runway 25r
cleared rolis 25n transition expect ols ils runway 25r decent fl100 to reach etaru, dlh3910 this is was from video full guide vatsim flight a to b

Forgive me if I am wrong.

In the two diagrams you provided I dont see any ‘transitions’ available. Each leg(route) of the procedure is independently named.

IF there is a ‘transition’ it will have the same name convention e.g. WHALE1A but would offer more than one waypoint from which to join that procedure. ATC would say “Cleared WHALE1A BURLY transition….” Which indicates that you join the WHALE1A from the waypoint BURLY as published.

I’m not 100% that this is what you are meaning. There is also Transition Altitude indicated on procedure charts which is when you change from 29.92 to the local QNH provided. The controller will tell you the QNH prior to reaching the Transition Altitude (TA).

There could also be the possibility that even though you have filed a SID and STAR on the system, the Controller may change that and issue instructions for something different. This would generally be said: “DHL1839, from BURLY cleared the WHALE1A for rwy25, expect the ILS.” This is only if BURLY was in your flight plan. IF ATC are directing you to a waypoint that isnt mentioned in your filed or previously cleared FP they will advise of new routing.

I hope that helps. I’m just not sure I am understanding your issue clearly sorry.

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There are no transitions like that anymore at EDDF (and there haven’t been for a couple of years, so it sounds like the video you are watching might be a bit outdated…). But the principle is the same as with a STAR, though the procedure may be listed as a VIA for an approach in your FMC instead of the ARR section.

Is a transition not simply the exit point out of a published procedure?
Or the connection between two procedures? Like an arrival connecting to an approach via the transition point?

Transition is used in various contexts in aviation. One of them could be, as you say, a published SID or STAR that can be joined/exited at various points, which may be called transitions (unfortunately I can’t think of a concrete example off the top of my head, though I think the US has these relatively often).
You could also have SIDs and STARs after which you connect to another published procedure that would usually be called transition (an example for this happening with SIDs is LIRF, where you could, e.g., be cleared for “SOSIV7B departure, SOVAN7A transition”; an example where this happens with STARs is LFPG where you might get “BIBAX9E arrival, MOPAR7W transition”- particularly when this happens with STARs you may also first get the STAR and only later, potentially by a different controller, the transition).
Then you have standalone transitions that, at least from a pilot POV, serve essentially the same purpose as a STAR (connecting you from the enroute environment to an IAF and/or a downwind). This is the type of transition of relevance for OP’s question considering he put his question in the context of German airspace.

Then there are also some other uses of the word transition (although they don’t really pertain to OP’s question), two that I can think of are standard taxi routes that may be called “transition something” and “on transition speed xyz” (i.e. at which IAS to switch from the Mach Number to IAS and continue to maintain that IAS - in ICAO-land you will more commonly hear “on conversion” or similar, though there is no standard phraseology for this type of instruction in many countries).

A transition level is basically when you switch from a set qnh to standard qnh.
Above the transition level you will use flight levels, e.g. FL70, instead of saying an altitude, e.g. 1000ft.

In the example diagrams you posted, there isn’t a transition level, which usually means atc will vector you in or direct you to land at your own discretion(on your own, reasonably).

See, transition level/altitude/layer is something I didn’t think of with the other examples, but it is not relevant for OP’s question, which is about transitions that, for pilot purposes, are identical to STARs except that they will usually appear as a via for the selected approach instead of as an arrival in the FMC.

ok thanks all of you
i got the meaning

On a SID, a Transition is the SID exit point and the waypoint where your flight plan starts outside of any assigned SID by ATC.

When Inbound to an airport you get 2 types of Transitions:
STAR Transition and;
Approach Transition.

It is merely points where you join the STAR or the point where you join the Approach. Not all airports have published STARS, but the approaches have different Transitions.

Look at Olney (KONY) for example it has no SID and STAR. The RNAV approach for RWY35 has 4 Transitions namely:

Your choice of Transition is normally determined by where you are joining or exiting, and that waypoint is normally part of your flight plan.

ok thank you