RFC for DALI-1.0

[Petr Skoda]

Dear all,

In the DALI document I do not see the relation to current protocols - 
in the introduction it should be mentioned how the DALI parameters are 
used in calling particular protocol - e.g. SSAP or SCS. That is

  in abstract
---
The goal of this specification is to define the common elements that are 
shared across DAL services 
---
so is SSAP or Conesearch a DAL service ? It is
so how I will call conesearch with all DALI params...?

how will DALI add to or replace the parameters send in http query 
representing e.g. conesearch  is not clear for me

then
----
The RESPONSEFORMAT parameter should not be confused with the FORMAT 
parameter used in many DAL services. The latter is generally used as a 
query parameter to search for data in the specified format; only in the 
case of TAP-1.0 are FORMAT and RESPONSEFORMAT equivalent.
----

seems to be very confusing as it is not clear what *FORMAT* should be sent 
if requesting votable or ASCII table

I understand this as the FORMAT is telling - search me data available in 
FITS and 
RESPONSEFORMAT is telling - please convert your output to votable or HTML

it is.. RESPONSEFORMAT is the postprocessing option ....
...
How this will work in practice?

If it is so I would recommend to explain this in more details in 3.2.3


If it is said that something describes the COMMON part I expect there is 
an example showing on particular protocol  what could be sent to the 
service

And in this context I do not understand the sentence

----
A service must respond with an error if the REQUEST parameter is missing
--
together with

--------
A simple query-only DAL service like ConeSearch can be easily described as 
having a single DALI-sync resource where the job is a query and the 
response is the result of the query. 
-----
(in chap 2)

many current services do not insist on REQUEST - in SSAP it is mandatory 
since 1.0 but the example with SCS is IMHO wrong as current conesearch is 
not DALI compatible as it might be called without REQUEST ....




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*  Petr Skoda                         Tel   : (323) 649201, l. 361      *
*  Stelarni oddeleni                          (323) 620361              *
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*  Ceska republika                                                      *
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