How to write "User" Stories from system to system?
<p>Note: I read the 2 following questions :</p>

<ul>
<li><a href="https://stackoverflow.com/questions/1707080/writing-user-stories-for-internal-technical-tasks">Writing user stories for internal technical tasks</a></li>
<li><a href="https://stackoverflow.com/questions/20581167/how-to-write-user-stories-for-technical-implementation-details">How to write User Stories for technical implementation details?</a></li>
</ul>

<p>Here's the "short" story :</p>

<p>I am a product owner assistant working with a team of business analysts for a bank (the client). The project (a multiple applications system) delivers reports for final users. The client wants us to help them in the way they write "stories". (better cutting)</p>

<p>At this point, Business analysts provide sequence diagram. The way they write stories are between technical implementation and ("user") stories.
Moreover, the stories are not INVEST because its follow sequence.</p>

<p>An exemple :</p>

<p><strong><em>Feature :</em></strong></p>

<pre><code>As a FO user (in real life it's a system)
I want to ensure the loaded database contains all mandatory data in a correct format
So that I can generate a valid report for my customer
</code></pre>

<p><strong><em>Scenario :</em></strong></p>

<pre><code>Given: I have loaded the database
When: It contains all mandatory data for proper report generation
And: The amounts formats do not fit the report generation rules
Then: I can convert the amounts formats (and go to the next step)
</code></pre>

<p>Here are my questions :</p>

<ul>
<li>Can we consider these stories as technical user stories ?</li>
<li>Should I have to consider that we cannot write "user stories" but persist with specifications ?</li>
<li>Do you have good inputs to convert sequence diagram to user stories ? Should i consider it as scenarios ?</li>
</ul>