Sure. To see deprecated classes for some version execute this query against it:

SELECT ID, Description FROM %Dictionary.ClassDefinition WHERE LOWER(Description) [ 'deprecated'

To see deprecated methods execute this query:

SELECT parent AS "Class", Name AS "Method", Description 
FROM %Dictionary.MethodDefinition 
WHERE LOWER(Description) [ 'deprecated'

And to see deprecated properties execute this query:

SELECT parent AS "Class", Name AS "Method", Description
FROM %Dictionary.PropertyDefinition 
WHERE LOWER(Description) [ 'deprecated'

Note, that this queries only return classes/methods/properties which contain "deprecated" in their definition. To catch deprecated inherited classes/methods/properties query %Dictionary.CompiledClass/%Dictionary.CompiledMethod/%Dictionary.CompiledProperty instead.

Hello.

How can I get/set pool size value for a Production item programmatically?  I can't find it in a "Settings Defaults" list.

Use $System.OBJ.Compile("class").

Here's Git  integration for studio.

Could you please tell what do you want to achieve with making 'Open as read-only' setting default?

Okay.

Please note, that only legacy IF sets $TEST and it is also one line long. New IF {} (3 lines, with brackets) does not set a $TEST variable.

Consider adding links to cache documentation from the page that describes the issue, we now have version agnostic urls even. For example this issue could use a link to documentation.

Another question is: what's wrong with postconditionals? They exist not only in caché objectscript and in fact very useful as they allow elimination of all 3 lines blocks with one if condition and one action to execute if if is true. Can I disable an issue type for a project?

Sure. You could use %CELLZERO instead:

WITH  MEMBER [MEASURES].[Revenue as Percent of Total] AS 'Measures.[Amount Sold] / %MDX("select Measures.[Amount sold] on 1 
from holefoods","%CONTEXT","filters|columns")',FORMAT_STRING='##.##%;;;;' 
MEMBER [MEASURES].[Revenue Percent Cumulative] AS 'Measures.[Revenue as Percent of Total] + %CELLZERO(0,-1)',
FORMAT_STRING='##.##%;;;;' SELECT {[Measures].[Amount Sold],[MEASURES].[REVENUE PERCENT CUMULATIVE]} ON 0,
NON EMPTY ORDER([Product].[P1].[Product Category].Members,Measures.[Amount Sold],BDESC) ON 1 FROM [HoleFoods] 

Jokes aside, why do you  need to remove %CELL usage?

There is also this way:

set p = ##class(%ZEN.proxyObject).%New()
set p.a = 1
set p.b = 2
do p.%ToJSON()
kill p.%data("b")
do p.%ToJSON()

kill p.%data("b") would completely remove b property. But better use Caché 2016.1 with native JSON support.

Another queue processing sample is now available in this GitHub repository, courtesy of Vladimir Prushkovskiy.

I assume that's a comment  to my answer?

If yes, here's the working code. Maybe I missed some changes in my answer. Because, again, I needed to do too much changes to run the code in the first place.

I made the following changes:

1.  Changed

Set mimePart.ContentType = "application/pdf"

to

Set mimePart.ContentType = "application/x-object"

2. Commented out:

Do mimeMsg.SetHeader("Content-Disposition","attachment; name=""Files1""; filename="""_docName_"""")          
Set mimeMsg.ContentTransferEncoding = "base64"

3. Uncommented:

 //Set req.ContentType = "multipart/form-data;boundary=" _mimeMsg.Boundary

After these change I received non-empty files object.

 "files": {
              "uploadedfile": "cd \\\r\n@echo start >> date.txt\r\n"
          }

Howether. Here's some tips on how to ask questions like these (with not working code samples):

1.  It must run everywhere. Remove the calls to other code (hardcode values if needed), like:

##class(HData.SiteSettings).GetFaxLogin()

2. Remove unused arguments, like coverpath

3. Remove non essential code like:

Set req.SSLConfiguration = "CardChoice"
Do req.InsertFormData("Username",##class(HData.SiteSettings).GetFaxLogin())
Do req.InsertFormData("Password",##class(HData.SiteSettings).GetFaxPassword())
Do req.InsertFormData("ProductId",##class(HData.SiteSettings).GetFaxProductId())
Do req.InsertFormData("cookies","false")
Do req.InsertFormData("header","header")

//Create job name for fax
Set sendDate = +$H
Set sendTime = $P($ZTIMESTAMP,",",2)+(15*60)
Set schedDate = $ZDATETIME(sendDate_","_sendTime,1,4)
Set schedDate = $E(schedDate,1,16)_" "_$E(schedDate,17,18)
Set docList = $LFS(docpath,"\")
Set docName = $LISTGET(docList,$LL(docList))
Do req.InsertFormData("JobName",schedDate_docName)
    
//format phone number and set billing code
Set num = $REPLACE(phone,"-","")
Do req.InsertFormData("BillingCode",num)
Do req.InsertFormData("Numbers1",num)
   
    
//get notification email
Set email = ##class(HData.SiteSettings).GetFaxNotifyEmail()
If (email '= "") Do req.InsertFormData("FeedbackEmail",email)

4. Comment out unused and misleading code paths like

Set base64 = ##class(%SYSTEM.Encryption).Base64Encode(docStream)
Set mimeMsg.ContentTransferEncoding = "base64"

5. Provide a GitHub Gist snippet of an xml file (with the code) to import and write how to run it.

Your goal, is to make it extremely easy for everyone to take a look at your snippet. All the process must consist of these two steps:

1. Drag&Drop xml file into Studio
2. Copy&Paste a line into a terminal

I meant: write a new class with method generator.  And inherit from it.

Since XMLEnabled class can be not persistent and, therefore, not have an extent at all, there is no such method. If you need to write  XMLExportToFile()  for several classes you can write method generator which generates a method that would:

1. Use current extent query
2. Iterate through it
3. Output each object into a file

And inherit all classes, in which you have a need of XMLExportToFile()  method from this class.