fix(133): add oas examples

Adding oas examples for create.

This also tests out the pattern outlined in aep-dev#230 - 
adding a generated oas.yaml and use selective elements from it
as an example, which looks to work pretty well.

There is a blocker on aep-dev/site-generator#43
to allow for support from a json-path like structure to target sub-elements, but
this will at least allow for selective guidance to be easily added.

aep/general/0133/aep.md.j2

@@ -31,6 +31,9 @@ Create methods are specified using the following pattern:
     **should** be the only variable in the URI path.
   - The collection identifier (`books` in the above example) **must** be a
     literal string.
+- Some resources take longer to be created than is reasonable for a regular API
+  request. In this situation, the API should use a [long-running
+  operation](/long-running-operations).
 
 {% tab proto %}
 
@@ -61,7 +64,7 @@ rpc CreateBook(CreateBookRequest) returns (Book) {
 
 {% tab oas %}
 
-**Note:** OAS guidance not yet written
+{% sample '../oas.yaml', '/publishers/{publisher_id}/books:' %}
 
 {% endtabs %}
 
@@ -107,38 +110,9 @@ message CreateBookRequest {
 
 {% tab oas %}
 
-**Note:** OAS guidance not yet written
+- The request body **must** be the resource being created.
 
-{% endtabs %}
-
-### Long-running create
-
-Some resources take longer to create a resource than is reasonable for a
-regular API request. In this situation, the API **should** use a long-running
-operation (AEP-151) instead:
-
-- The response type **must** be set to the resource (what the return type would
-  be if the RPC was not long-running).
-
-{% tab proto %}
-
-```proto
-rpc CreateBook(CreateBookRequest) returns (aep.api.Operation) {
-  option (google.api.http) = {
-    post: "/v1/{parent=publishers/*}/books"
-  };
-  option (aep.api.operation_info) = {
-    response_type: "Book"
-    metadata_type: "OperationMetadata"
-  };
-}
-```
-
-- Both the `response_type` and `metadata_type` fields **must** be specified.
-
-{% tab oas %}
-
-**Note:** OAS guidance not yet written
+{% sample '../oas.yaml', 'book:' %}
 
 {% endtabs %}
 
@@ -167,10 +141,6 @@ publishers/lacroix/books/les-miserables
 publishers/012345678-abcd-cdef/books/12341234-5678-abcd
 ```
 
-- The `id` field **must** exist on the request message, not the resource
-  itself.
-  - The field **may** be required or optional. If it is required, it **should**
-    include the corresponding annotation.
 - The `path` field on the resource **must** be ignored.
 - The documentation **should** explain what the acceptable format is, and the
   format **should** follow the guidance for resource path formatting in
@@ -187,16 +157,17 @@ publishers/012345678-abcd-cdef/books/12341234-5678-abcd
   the RPC, with a value of `"parent,{resource},id"` if the resource being
   created is not a top-level resource, or with a value of `"{resource},id"` if
   the resource being created is a top-level resource.
+- The `id` field **must** exist on the request message, not the resource
+  itself.
+  - The field **may** be required or optional. If it is required, it **should**
+    include the corresponding annotation.
 
 {% tab oas %}
 
-**Note:** OAS guidance not yet written
+- The `id` is a query parameter on the request URI.
 
 {% endtabs %}
 
-**Note:** For REST APIs, the user-specified ID field, `id`, is provided as a
-query parameters on the request URI.
-
 ### Errors
 
 See [errors][], in particular [when to use PERMISSION_DENIED and NOT_FOUND

aep/general/0134/aep.md.j2

@@ -54,7 +54,7 @@ rpc UpdateBook(UpdateBookRequest) returns (Book) {
 
 {% tab oas %}
 
-**Note:** OAS example not yet written.
+{% sample '../oas.yaml', '$.paths./publishers.post' %}
 
 {% endtabs %}
 
@@ -112,7 +112,7 @@ message UpdateBookRequest {
 
 {% tab oas %}
 
-**Note:** OAS example not yet written.
+{% sample '../oas.yaml', '$.paths./publishers.post.parameters' %}
 
 {% endtabs %}
 
@@ -160,79 +160,12 @@ If a rating were set on a book and the existing `PUT` request were executed, it
 would wipe out the book's rating. In essence, a `PUT` request unintentionally
 would wipe out data because the previous version did not know about it.
 
-### Long-running update
-
-Some resources take longer to update a resource than is reasonable for a
-regular API request. In this situation, the API **should** use a [long-running
-operation][AEP-151] instead:
-
-- The response type **must** be set to the resource (what the return type would
-  be if the method were not long-running).
-
-{% tab proto %}
-
-```proto
-rpc UpdateBook(UpdateBookRequest) returns (aep.api.Operation) {
-  option (google.api.http) = {
-    patch: "/v1/{book.name=publishers/*/books/*}"
-  };
-  option (aep.api.operation_info) = {
-    response_type: "Book"
-    metadata_type: "OperationMetadata"
-  };
-}
-```
-
-- Both the `response_type` and `metadata_type` fields **must** be specified.
-
-{% tab oas %}
-
-**Note:** OAS example not yet written.
-
-{% endtabs %}
-
+### Create or Update
 
 If the service uses client-assigned resource paths, `Update` methods **may**
 expose a `bool allow_missing` field, which will cause the method to succeed in
 the event that the user attempts to update a resource that is not present (and
-will create the resource in the process):
-
-{% tab proto %}
-
-```proto
-message UpdateBookRequest {
-  ...
-
-  // If set to true, and the book is not found, a new book will be created.
-  // In this situation, `update_mask` is ignored.
-  bool allow_missing = 3;
-}
-```
-
-{% tab oas %}
-
-**Note:** OAS example not yet written.
-
-{% endtabs %}
-
-More specifically, the `allow_missing` flag triggers the following behavior:
-
-- If the method call is on a resource that does not exist, the resource is
-  created. All fields are applied regardless of any provided field mask.
-  - However, if any required fields are missing or fields have invalid values,
-    an `INVALID_ARGUMENT` error is returned.
-- If the method call is on a resource that already exists, and all fields
-  match, the existing resource is returned unchanged.
-- If the method call is on a resource that already exists, only fields declared
-  in the field mask are updated.
-
-The user **must** have the update permissions to call `Update` even with
-`allow_missing` set to `true`.
-
-If the service uses client-assigned resource paths, `Update` methods **may**
-expose a `bool allow_missing` field, which will cause the method to succeed in
-the event that the user attempts to update a resource that is not present (and
-will create the resource in the process):
+will create the resource in the process).
 
 {% tab proto %}
 
@@ -315,7 +248,7 @@ message Book {
 
 {% tab oas %}
 
-**Note:** OAS example not yet written.
+{% sample '../oas.yaml', '$.components.schemas.publisher' %}
 
 {% endtabs %}
 

aep/general/0158/aep.md.j2

@@ -55,7 +55,7 @@ message ListBooksResponse {
 
 {% tab oas %}
 
-**Note:** OAS example not yet written.
+{% sample '../oas.yaml', '$.paths./publishers.get' %}
 
 {% endtabs %}
 

aep/general/0217/aep.md.j2

@@ -31,7 +31,7 @@ message ListBooksResponse {
 
 {% tab oas %}
 
-**Note:** OAS example note yet written.
+{% sample '../oas.yaml', '$.paths./publishers/{publisher}/books.get.responses.200.content.application/json' %}
 
 {% endtabs %}