README.md in jekyll-theme-open-hub-0.1.3 vs README.md in jekyll-theme-open-hub-0.1.4

@@ -94,19 +94,19 @@
   ```yaml
   title: Site title
   description: Site description
   # The above two are used by jekyll-seo-tag for things such as
   # `<title>` and `<meta>` tags, as well as elsewhere by the theme.
-  
+
   collections:
     posts:
       output: true
       permalink: /blog/:month-:day-:year/:title/
     pages:
       output: true
       permalink: /:name/
-  
+
   defaults:
     - scope:
         path: ""
       values:
         layout: default
@@ -204,11 +204,11 @@
 
 ### Project, spec and software data
 
 See the section about project data structure.
 
-In addition to that, _when used within hub site_ each project subdirectory
+_When used within hub site_ (only), each project subdirectory
 must contain a file "index.md" with frontmatter like this:
 
 ```yaml
 title: Sample Awesome Project
 
@@ -269,30 +269,30 @@
     email: [e-mail]
 
 author: "Company or Individual Name Goes Here"
 
 collections:
+  # ... (other collections)
   software:
     output: true
     permalink: /:name/
   specs:
     output: true
     permalink: /:name/
-  # ... (other collections)
 
 defaults:
+  # ... (other defaults)
   - scope:
       path: _software
       type: software
     values:
       layout: product
   - scope:
       path: _specs
       type: specs
     values:
       layout: spec
-  # ... (other defaults)
 ```
 
 File layout is the same as described in the section
 about shared project data structure, with _software and _specs directories
 found in the root of your Jekyll site.
@@ -354,9 +354,16 @@
 
 YAML frontmatter specific to specs:
 
 ```yaml
 rfc_id: XXXX
+# IETF RFC URL would be in the form 
+# http://ietf.org/html/rfc<id>
+
+ietf_datatracker_id: some-string-identifier-here
+ietf_datatracker_ver: "01"
+# IETF datatracker URL would be in the form
+# https://datatracker.ietf.org/doc/<id>[-<version>]
 ```
 
 Specs that are not hosted elsewhere (such as ietf.org for RFCs)
 are expected to contain the actual specification content after frontmatter.
 Start with second-level header (##).