Evolution of schema.org to Resolve Structured Data Error “Node is Empty”

Recently Google Webmaster just upgrades their structured data testing tool. New Google Webmasters Structured Data Testing Tool - split screen data validation with extended support of the JASON markup syntax. Google has extended their support for schema.org vocabulary in newly markup format JSON-LD syntax to new use personal belongings: website logos, contact detail, linked social profile, upcoming events in the Knowledge Graph, the sitelinks search box, and much more event rich snippets. Google is working on expanding support to additional markup-powered features in the future. Webmasters new structured data markup tasting tool helps your content get discovered easily in search results and across Google assets. The new webmasters SDTT better reflects how Google understands a web page’s structured data markup. 

How to Resolve Structured Data Error "Node is empty. Double check that this is desired and consider removing."?

Google and other major search engines support the schema.org vocabulary for structured data elements with an itemscope attribute and an itemtype attribute that references a vocabulary that is defined to support global identifiers for items may also defines a standard set of type names and property names for this vocabulary, to give a global identifier for the itemtype.

Schema.org vocabulary itemtypes attributes are dense identifiers, and search engine must not dereference undefined item types, or otherwise deconstruct them, in order to determine how to process items that use them. So, the itemtype attribute must not be specified on elements that do not have specified with an itemscope attribute.

In my case I am using itemtype and itemscop within same elements (itemscope='itemscope' itemtype='http://schema.org/BlogPosting'), and itempro in other elements see in example below:  

<div class='post hentry uncustomized-post-template' itemscope='itemscope' itemtype='http://schema.org/BlogPosting'>
                    <b:if cond='data:blog.pageType == &quot;item&quot;'>
                      <b:if cond='data:post.title'>
                        <h1 class='post-title entry-title' itemprop='name'>
                          <b:if cond='data:post.link'>
                            <a expr:href='data:post.link' itemprop='url'>
                              <data:post.title/>
                            </a>
                            <b:else/>
                            <b:if cond='data:post.url'>
                              <b:if cond='data:blog.url != data:post.url'>
                                <a expr:href='data:post.url' itemprop='url'>
                                  <data:post.title/>
                                </a>
                                <b:else/>
                                <data:post.title/>
                              </b:if>
                              <b:else/>
                              <data:post.title/>
                            </b:if>
                          </b:if>
                        </h1>
                      </b:if>
                      <b:else/>
                      <b:if cond='data:post.title'>
                        <h2 class='post-title entry-title' itemprop='name'>
                          <b:if cond='data:post.link'>
                            <a expr:href='data:post.link' itemprop='url'>
                              <data:post.title/>
                            </a>
                            <b:else/>
                            <b:if cond='data:post.url'>
                              <b:if cond='data:blog.url != data:post.url'>
                                <a expr:href='data:post.url' itemprop='url'>
                                  <data:post.title/>
                                </a>
                                <b:else/>
                                <data:post.title/>
                              </b:if>
                              <b:else/>
                              <data:post.title/>
                            </b:if>
                          </b:if>
                        </h2>
                      </b:if>
                    </b:if>