4. Metaweb Read Services

4. Metaweb Read Services: c# example

2008-08-29T04:26:34.0012Z

Thanks, weblivz! Probably the best place to put this is under Application Developer Tips, but I'm copying our docs guy, Phil, on this so he can help you out.

4. Metaweb Read Services: c# example

2008-08-19T17:42:53.0017Z

As there is not one above, i created a C# version here :

http://tinyurl.com/6y6hea

If anyone knows a good place to put it please do so. New to this so don't wanna edit the description of the article!

4. Metaweb Read Services: Fetching Content with trans

2008-06-08T10:14:57.0005Z

section 4.8 states "The trans service does not support a callback parameter as the mqlread service does", this is outdated since the api states it can and it can:

http://www.freebase.com/view/guid/9202a8c04000641f8000000007628edf

The trans example could use some improvement too since it is digging out "unrelated" documents from the store. It would be more informative and more consistent to get documents on the band "the police"

Query to get guid's for articles and images
{
"article" : [
    {
      "guid" : [
        {}
      ],
      "id" : null
    }
],
"id" : "/en/the_police",
"image" : [
    {
      "guid" : [
        {}
      ],
      "id" : null
    }
],
"type" : "/common/topic"
}

Query to get the article (function foo can format result without using a proxy):
http://www.freebase.com/api/trans/raw/guid/9202a8c04000641f800000000006df25?callback=foo

Query to get the image (you can use this as the source property of the image element)
http://www.freebase.com/api/trans/image_thumb/guid/9202a8c04000641f8000000003c18713?maxwidth=300&maxheight=300
Note: you cannot make an image bigger than the origional with maxwith and maxheight

4. Metaweb Read Services: query editor

2008-04-26T09:37:13.0012Z

Good morning freebaser,

I just began to dive into freebase API - the query editor is invaluable, makes it so easy to get started. Congrats ....

cheers

martin

ps An Actionscript example would be handy ;-)

4. Metaweb Read Services: Bug in Example 4.8

2008-01-25T13:33:43.0012Z

There's a bug in Example 4.8. The line that reads

"?queries=" + querytext + "&callback;=Metaweb." + callbackName

should read

"?queries=" + querytext + "&callback=Metaweb." + callbackName

(no semicolon)

Otherwise the callback doesn't get called.

Eric

4. Metaweb Read Services: GET has a URL limit of around 4000 characters

2008-01-15T00:59:56.0007Z

We should change the documentation; I have forwarded this suggestion, thanks.

4. Metaweb Read Services: GET has a URL limit of around 4000 characters

2008-01-14T20:41:00.0012Z

If you try a GET query that has the URL length go above about 4000 characters, you will get a "Transient Error" from the Freebase API. The API should really return an error of "URL too long, use POST".

Even though it isn't mentioned, the MQL Read does support POST. I recommend using it instead of GET.

4. Metaweb Read Services: Cursor Lifetime

2008-01-11T21:55:56.0007Z

Hi rath,

The short answer is that cursors are stateless. The kinds of things that invalidate cursors are cursor format changes that happen with database software upgrades; but they're safe against time, session ends, or reuse.

If you're trying to use a cursor, and get a BADCURSOR reply from the server back, and there wasn't a database software upgrade, there are two possible explanations:

(a) a bug - cursors are complicated and underused, and it's quite possible that you're running into a bug.

(b) you've changed the query in some small way, so the cursor checksum that encodes the constraint around the cursor as well as the cursor text no longer matches the constraint you're actually submitting along with the cursor.

If it's an intermittent problem, it's likely (a); if it fails reliably, it's likely (b).

4. Metaweb Read Services: Cursor Lifetime

2008-01-10T15:06:07.0005Z

I can't seem to find anything documenting the lifetime of a cursor value returned from the MQL read service.

Do cursors persist between query sessions? If so, for how long? Could I run a query to obtain some data, save the cursor, and then continue where I left off a few days later?

Thanks.

4. Metaweb Read Services: trans service DOES support a callback parameter

2008-01-08T17:44:41.0000Z

For some reason my Exhibit A link above has been corrupted.

Here is a link showing the 'raw' API with a callback param:

http://www.freebase.com/api/trans/raw/%239202a8c04000641f8000000003c1978c?callback=cb

4. Metaweb Read Services: trans service DOES support a callback parameter

2007-08-16T10:45:31.0004Z

Despite what it says in 4.8. Fetching Content with trans, the trans service DOES support a callback parameter. See