From e0111575df9e93e96b3b54362078ea14c7fed7a7 Mon Sep 17 00:00:00 2001
From: alexcos20 <alex.coseru@gmail.com>
Date: Fri, 3 Dec 2021 00:30:27 -0800
Subject: [PATCH] add multiple storage types

---
 content/concepts/did-ddo.md | 60 +++++++++++++++++++++++++++++++++++--
 1 file changed, 58 insertions(+), 2 deletions(-)

diff --git a/content/concepts/did-ddo.md b/content/concepts/did-ddo.md
index b2ab357e..d81294c6 100644
--- a/content/concepts/did-ddo.md
+++ b/content/concepts/did-ddo.md
@@ -196,12 +196,68 @@ Example:
 }
 ```
 
-During the publish process, file URLs must be encrypted with a respective _Provider_ API call before storing the DDO on-chain. For this an array of strings with one or multiple URLs is what gets encrypted and send to _Provider_:
+During the publish process, file URLs must be encrypted with a respective _Provider_ API call before storing the DDO on-chain. For this an array of objects defining the storage access details are sent. 
+Type of objects supported :
+
+<table>
+<tr>
+<th>Key</th>
+<th>Description</th>
+<th>Example</th>
+</tr>
+<td>'url'</td>
+<td>Static URL.  Contains url and HTTP method</td>
+<td>
 
 ```json
-["https://url.com/file1.csv", "https://url.com/file2.csv"]
+[
+   {
+      "url":{
+         "url":"https://url.com/file1.csv",
+         "method":"GET"
+      }
+   },
+   {
+      "url":{
+         "url":"https://url.com/file2.csv",
+         "method":"POST"
+      }
+   }
+]
 ```
 
+</td>
+</tr></table>
+
+First class integrations supported in the future :
+
+<table>
+<tr>
+<th>Key</th>
+<th>Description</th>
+<th>Example</th>
+</tr>
+<tr>
+<td>"ipfs"</td><td>IPFS files</td>
+<td>
+
+ ```json
+[ 
+  { "ipfs": { "hash":"XXX"}}
+]
+```
+</td>
+
+<tr><td>"filecoin"</td><td>Filecoin storage</td><td>&nbsp;</td></tr>
+<tr><td>"arwave"</td><td>Arwave</td><td>&nbsp;</td></tr>
+<tr><td>"storj"</td><td>Storj</td><td>&nbsp;</td></tr>
+<tr><td>"sql"</td><td>Sql connection, dataset is generated by a query</td><td>&nbsp;</td></tr>
+</table>
+
+
+A service can contain multiple files, using multiple storage types.
+
+
 To get information about the files after encryption, the `/fileinfo` endpoint of _Provider_ returns based on a passed DID an array of file metadata:
 
 ```json