Thank you @olegbogdanov for raising the question and thank you all for your input.   If it helps someone please find my first dynamic solution to assign libraries in batch code in the manner to avoid hardcoded LIBNAME statements %let lib_ref = SASHELP; /* As for example */ %let SERVICESBASEURL=%sysfunc(getoption(servicesbaseurl)); /* Assign a temporary file to store the response */ filename resp temp; proc http url="&SERVICESBASEURL./dataSources/providers/Compute/sourceDefinitions?filter=eq(defaultLibref,%27&lib_ref.%27)" method="GET" oauth_bearer=sas_services out=resp; headers "Accept"="application/json"; run; libname respjson json fileref=resp; /* Check if the dataset exists */ %if %sysfunc(exist(respjson.items_links)) %then %do; /* assign library definition value to macro variable*/ data _null_; set respjson.items_links; where ordinal_items = 1 and rel = 'self'; /* choose the first match */ call symputx('lib_def', uri); run; %end; %else %do; %put --------------------; %put WARNING: Library &lib_ref. was not found.; %put --------------------; %return; %end; libname respjson clear; /* Actual LIBNAME statement */ libname &lib_ref. libdef="&lib_def."; ... View more

In case someone has the same issue, here is something I use for now to get URI and assign predescribed library %let lib_ref = SASHELP; /* just for example - SASHELP is preassigned */ %let SERVICESBASEURL=%sysfunc(getoption(servicesbaseurl)); /* Assign a temporary file to store the response */ filename resp temp; proc http url="&SERVICESBASEURL./dataSources/providers/Compute/sourceDefinitions?filter=eq(defaultLibref,%27&lib_ref.%27)" method="GET" oauth_bearer=sas_services /* how come this is hard to find in documentation */ out=resp; headers "Accept"="application/json"; run; libname respjson json fileref=resp; /* Check if the dataset exists */ %if %sysfunc(exist(respjson.items_links)) %then %do; /* assign library definition value to macro variable*/ data _null_; set respjson.items_links; where ordinal_items = 1 and rel = 'self'; /* choose the first match */ call symputx('lib_def', uri); run; %end; %else %do; %put --------------------; %put WARNING: Library &lib_ref. was not found.; %put --------------------; %return; %end; libname respjson clear; /* actual library assignation */ libname &lib_ref. libdef="&lib_def."; ... View more

As this might be helpful for someone, I'd like to share a one possible solution using PROC HTTP for API call to get library definition and assign a library It is important to get and use predescribed library definitions when you have thousands of jobs and suddenly you have to move your storage %let lib_ref = SASHELP; /* as example */ %let SERVICESBASEURL=%sysfunc(getoption(servicesbaseurl)); /* Assign a temporary file to store the response */ filename resp temp; proc http url="&SERVICESBASEURL./dataSources/providers/Compute/sourceDefinitions?filter=eq(defaultLibref,%27&lib_ref.%27)" method="GET" oauth_bearer=sas_services out=resp; headers "Accept"="application/json"; run; libname respjson json fileref=resp; /* Check if the dataset exists */ %if %sysfunc(exist(respjson.items_links)) %then %do; /* assign library definition value to macro variable*/ data _null_; set respjson.items_links; where ordinal_items = 1 and rel = 'self'; /* choose the first match */ call symputx('lib_def', uri); run; %end; %else %do; %put --------------------; %put WARNING: Library &lib_ref. was not found.; %put --------------------; %return; %end; libname respjson clear; libname &lib_ref. libdef="&lib_def."; ... View more

Dear @Sajid01  Thank you for consideration, although this might not seem to be the best idea, when you should work in environment with hundres of libraries and thousands of different projects.  Not mentioning the count of develpers or scheduled jobs. So far we have used predescribed libaries also for the reason if we should relocate data for any reason.  When we used LIBNAME META engine to assign only the libraries needed at that exact moment we prevented lag in session start caused by assigning all the libraries.  And when data was relocated (or authentication policy changed), changing the library description in metadata kept our jobs running without the hassel of changing the hardcoded library statements on all jobs.   Using autoexec for libary assignment does not address the challanges we are facing, thats why I am wondering if there is a simpler way available for us than using REST API to retrieve LIBRARY's URI searching by NAME and then creating dynamic LIBNAME statement with LIBRARYDEFINITION option  ... View more

Dear @NicolasRobert  In SAS9 it was possible to use meta engine to assign predefined libraries as they were describer in metadata. for example:  libname MYDATA meta library=“MYDATA“; As libraries are now described in Data Sources microservice and meta engine is no longer available   - how can we now use "MYDATA" (i.e library name) to assign predefined library with statement in SAS code and avoid using the long URI with LIBRARYDEFINITION option.   and I mean SPRE, not CAS environment   If you are not the right person to ask, would you be so kind to pass the question to more suitable person Thank you in advance! ... View more

Dear @GerryNelson  As stated: Disconnected libraries are useful for libraries that are used infrequently, they can save on server startup times. In SAS9 it was possible to use meta engine to assign predefined libraries as they were describer in metadata. for example:  libname MYDATA meta library=“MYDATA“; As libraries are now described in Data Sources microservice and meta engine is no longer available - how can we now use "MYDATA" (i.e library name) to assign predefined library with statement in SAS code and avoid using the long URI with LIBRARYDEFINITION option. Thank you in advance!   ... View more