[Developers] improved topic query

[Warren Harris]

Here's an improved version of the topic query I sent out earlier today:

- annotation (prefixes) for roles the various properties play  
(hopefully this will make the result a little easier to grock)
- most of the schema for cvt properties moved into cvt:properties  
field (only the key(s) remain under the data's link master_property to  
serve as back-pointers to the schema
- more optional declarations here and there (I was missing some results)
- limits removed (add at your own risk/leisure)

To use this, you have to substitute the 6 occurrences of the topic id  
("/guid/9202a8c04000641f80000000002eb15e" below = the movie "Hard  
Eight" -- any guid/key/id will do!). You can also restrict the types  
of interest by replacing "id":null on the 4th line with "id|=":["/ 
award/award_winning_work","/fictional_universe/work_of_fiction"], for  
example.

Enjoy (as I go nurse my headache), :-)

Warren

{
"id":"/guid/9202a8c04000641f80000000002eb15e",
"type":[{
  "id":null,
  "name":null,
  "guid":null,
  "properties":[{
     "optional":true,
     "id":null, "name":null, "guid":null,
     "index" : null, "sort":"index",
     "expected_type":{
         "id": null, "name":null, "guid":null,
         "cvt:properties":[{
             "cvt_to_topic_key:id":null, "name":null,
             "index" : null, "sort":"index",
             "expected_type":null,
             "/freebase/property_hints/disambiguator":true,
             "topic_to_cvt_key:reverse_property": null,
             "optional":true
         }]
     },
     "o:links":[{
         "source": {"id": "/guid/ 
9202a8c04000641f80000000002eb15e","limit":0},
         "target_value":null,
         "target":{
             "id":null, "guid":null, "name":null,
             "cvt_links:/type/reflect/any_master":[{
                 "name":null, "id":null, "guid":null,
                 "link":{"master_property":{
                             "/freebase/property_hints/ 
disambiguator":true,
                             "target_cvt_to_topic_key:id":null,
                              
"topic_to_target_cvt_key:reverse_property": null},
                         "target": {"id": "/guid/ 
9202a8c04000641f80000000002eb15e","optional":"forbidden"}},
                 "optional":true
             }],
             "cvt_values:/type/reflect/any_value":[{
                 "value":null, "type":null,
                 "link":{"master_property":{
                             "/freebase/property_hints/ 
disambiguator":true,
                             "target_cvt_to_value_key:id":null},
                         "target": {"id": "/guid/ 
9202a8c04000641f80000000002eb15e","optional":"forbidden"}},
                 "optional":true
             }],
             "optional":true
         },
         "optional":true
     }],
     "master_property":{
         "id":null, "name":null, "guid":null,
         "i:links":[{
             "target": {"id": "/guid/ 
9202a8c04000641f80000000002eb15e","limit":0},
             "target_value":null,
             "source":{
                 "name":null, "id":null, "guid":null,
                 "cvt_links:/type/reflect/any_master":[{
                     "name":null, "id":null, "guid":null,
                     "link":{"master_property":{
                                 "/freebase/property_hints/ 
disambiguator":true,
                                 "source_cvt_to_topic_key:id":null,
                                  
"topic_to_source_cvt_key:reverse_property": null},
                             "target": {"id": "/guid/ 
9202a8c04000641f80000000002eb15e","optional":"forbidden"}},
                     "optional":true
                 }],
                 "cvt_values:/type/reflect/any_value":[{
                     "value":null, "type":null,
                     "link":{"master_property":{
                                 "/freebase/property_hints/ 
disambiguator":true,
                                 "source_cvt_to_value_key:id":null,
                                  
"value_to_source_cvt_key:reverse_property": null}},
                     "optional":true
                 }],
                 "optional":true
             },
             "optional":true
         }],
         "optional":true
     }
     }]
  }]
}





On Jul 9, 2008, at 12:23 PM, Jason Douglas wrote:

> On Jul 9, 2008, at 10:37 AM, Warren Harris wrote:
>
>> It occurred to me that you can get the schema information for cvt
>> properties with this all-in-one query at the same time you get
>> everything else (whether or not the object in question has values
>> for those properties) by requesting more from the expected_type
>> clauses. Unfortunately, this means your application has to look in 2
>> places in the result to know what/how to display -- first in the
>> property's expected_type's properties (for cvt schema), and then in
>> the property's links' target's any_master/any_value for whether or
>> not there are values of these cvt properties (yeah... don't try this
>> at home):
>
>
> That's what I was looking for, thanks!  In some ways it's actually
> better to have the property metadata separate -- i.e., build a table
> header separately from the rows.
>
> -jason
>
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