diff --git a/README.md b/README.md
index f079da6..02bd1fd 100644
--- a/README.md
+++ b/README.md
@@ -40,14 +40,24 @@ this larger namespace.  But, we don't want to be so general that the spec become
 Our guiding principles for development of this namespace are the "[Rules for Standards Makers](http://scripting.com/2017/05/09/rulesForStandardsmakers.html)" by Dave Winer.
 Please read it before contributing if you aren't familiar with it.
 
+
 ## Official XMLNS definition
 
 To see the formalized tags, see the official definition file [here](docs/1.0.md).
 
+
 ## Supporting platforms and apps
 
 To see a list of platforms and apps that currently implement some or all of these tags, see the list [here](docs/element-support.md).
 
+
+## Example feed
+
+There is an example feed [example.xml](example.xml) in this repository showing the podcastindex namespace side by side with the Apple itunes namespace.  There is also
+a "sandbox" feed where we experiment with tags while they are being hashed out.
+
+The url for that feed is:  [https://noagendaassets.com/enc/pc20sandbox.xml](https://noagendaassets.com/enc/pc20sandbox.xml).
+
 <br><br>
 
 ## Element List
@@ -113,6 +123,8 @@ To see a list of platforms and apps that currently implement some or all of thes
     - CountryCode: (required) The ISO 3166-1 alpha-2 country code, eg 'US'. (Note that the United Kingdom is 'GB', not 'UK'.)
     - Locality: (recommended) With a pipe separator from the countrycode, this is a humanly-readable place name as preferred by the podcast publisher.
 
+   The maximum recommended string length of the node value is 128 characters.
+
 <br>
 
 - **\<podcast:person role="[host or guest]" img="[(uri of content)]" href="[(uri to website/wiki/blog)]">**[name of person]**</podcast:person>**
@@ -126,6 +138,8 @@ To see a list of platforms and apps that currently implement some or all of thes
    - `img` (optional) This is the url of a picture or avatar of the person.
    - `href` (optional) Link to a relevant resource of information about the person. (eg. website, blog or wiki entry).
 
+   The maximum recommended string length of the node value is 128 characters.
+
 <br>
 
 - **\<podcast:contact type="[feedback or advertising or abuse]" method="[email or link]">**[email address or url]**\</podcast:contact>**
@@ -203,6 +217,8 @@ To see a list of platforms and apps that currently implement some or all of thes
    - `platform` (required) Identifies a payment or funding platform for the podcast. Service slugs should be recorded here in the repository.
    - `node value` (required) Used as free form string from the podcast owner to show to the listeners.  Ex. "Support us on Patreon!"
 
+   The maximum recommended string length of the node value is 128 characters.
+
 
 <br><br>
 
@@ -217,6 +233,8 @@ To see a list of platforms and apps that currently implement some or all of thes
 
    This element lists social media accounts for this podcast.  The service slugs should be community written into the accompanying serviceslugs.txt file.
 
+   The maximum recommended string length of the node value is 128 characters.
+
 <br>
 
 - **\<podcast:category>**[category Name]**\</podcast:category>**
@@ -298,12 +316,4 @@ representing the platform, directory, host, app or service. The slugs will look
 - anchor
 - overcast
 
-More should be added by the community as needed.  This is just a starter list.
-
-
-<br><br>
-
-
-## Example feed
-
-There is an example feed (example.xml) in this repository showing the podcastindex namespace side by side with the Apple itunes namespace.
+More should be added by the community as needed.  This is just a starter list.  The full list is [here](serviceslugs.txt).