adding note on start/stop profiles

Author: CamDavidsonPilon

user-guide/03-Extending your Pioreactor/04-Experiment Profiles/03-start-stop-profiles.md

@@ -0,0 +1,43 @@
+---
+title: Running and stopping experiment profiles
+slug: /start-stop-experiment-profiles
+---
+
+### Running an experiment profile
+
+Once you've created your profile to your satisfaction, you can run it from the UI's Profile page. Select your profile from the dropdown, and choose to run it. You can run multiple experiment profiles at once, including multiple instances of the same profile.
+
+The profile begins immediately, and you should see it running in the right-most box (refresh the page if you don't see it).
+
+:::tip
+Alternatively, you can run a profile in "dry-run" mode, which doesn't perform any actions, just prints out what would occur instead.
+:::
+
+You can also run profiles from the leader's command line. To run a profile, use:
+
+```bash
+pio run experiment_profile execute </path/to/experiment_profile/.yaml> <experiment_name>
+```
+For example:
+
+```bash
+pio run experiment_profile execute /home/pioreactor/.pioreactor/experiment_profiles/chemostat_in_out_2.yaml 'level tests'
+```
+
+
+### Stopping experiment profiles
+
+From the same page, you can stop any running experiment profile. This will halt any jobs that were started by the profile, and stop executing any new actions in the queue.
+
+From the command line, you can run:
+
+```bash
+pio kill --job-name experiment_profiles
+```
+
+This will actually kill _all_ experiment profiles running. To specify a specific profile, use it's job-id:
+
+```bash
+pio kill --job-id <job-id>
+```
+

user-guide/03-Extending your Pioreactor/04-Experiment Profiles/10-experiment-profiles-schema.md

@@ -3,13 +3,13 @@ title: Experiment profiles schema
 slug: /experiment-profiles-schema
 ---
 
-
 Below is a schema for experiment profiles. We also do a run-time check.
 
 ```yaml
 # Main structure of the experiment profile
 experiment_profile_name: <string>  # Name of the experiment profile
 
+
 # Metadata section (optional)
 metadata:
   author: <string>      # Author of the experiment profile
@@ -20,6 +20,12 @@ plugins:
   - name: <string>        # Name of the plugin
     min_version: <string> # Minimum required version of the plugin
 
+# inputs for variables that can be used in expressions (optional)
+inputs:
+  var1: value1
+  var2: value2
+
+
 # Common jobs section (optional)
 # Jobs that are common for all Pioreactors
 common: