Note how to clear job and partition fields. In particular a job's

RequiredNodeList, Dependency, or Features. or to clear Noodes and
AllowGroups for a partition.

doc/man/man1/scontrol.1

-.TH SCONTROL "1" "July 2004" "scontrol 0.3" "Slurm components"
+.TH SCONTROL "1" "August 2004" "scontrol 0.4" "Slurm components"
 
 .SH "NAME"
 scontrol \- Used view and modify Slurm configuration and state.
@@ -163,14 +163,23 @@ Repeat the last command executed.
 .TP
 \fBSPECIFICATIONS FOR UPDATE COMMAND, JOBS\fR
 .TP
+\fIAccount\fP=<account>
+Account name to be changed for this job's resource use.
+Value may be cleared with blank data value, "Account=".
+.TP
 \fIContiguous\fP=<yes|no>
 Set the job's requirement for contiguous (consecutive) nodes to be allocated. 
 Possible values are"YES" and "NO".
 .TP
+\fIDependency\fP=<job_id>
+Defer job's initiation until specified job_id completes.
+Cancel dependency with job_id value of "0", "Depedency=0".
+.TP
 \fIFeatures\fP=<features>
 Set the job's required features on nodes specified value. Multiple values 
 may be comma separated if all features are required (AND operation) or 
 separated by "|" if any of the specified features are required (OR operation).
+Value may be cleared with blank data value, "Features=".
 .TP
 \fIJobId\fP=<id>
 Identify the job to be updated. This specification is required.
@@ -196,6 +205,7 @@ Set the job's priority to the specified value.
 \fIReqNodeList\fP=<nodes>
 Set the job's list of required node. Multiple node names may be specified using 
 simple node range expressions (e.g. "lx[10-20]"). 
+Value may be cleared with blank data value, "ReqNodeList=".
 .TP
 \fIReqNodes\fP=<count>
 Set the job's count of required nodes to the specified value.
@@ -232,8 +242,9 @@ changing its underlying state.
 \fBSPECIFICATIONS FOR UPDATE AND DELETE COMMANDS, PARTITIONS\fR
 .TP
 \fIAllowGroups\fP=<name>
-Identify the user groups which may use this partition. Multiple groups 
-may be specified in a comma separated list. 
+Identify the user groups which may use this partition. 
+Multiple groups may be specified in a comma separated list. 
+To permit all groups to use the partition specify "AllowGroups=ALL".
 .TP
 \fIDefault\fP=<yes|no>
 Specify if this partition is to be used by jobs which do not explicitly 
@@ -249,6 +260,7 @@ Possible values are"YES" and "NO".
 Identify the node(s) to be associated with this partition. Multiple node names 
 may be specified using simple node range expressions (e.g. "lx[10-20]"). 
 Note that jobs may only be associated with one partition at any time.
+Specify a blank data value to remove all nodes from a partition: "Nodes=".
 .TP
 \fIPartitionName\fP=<name>
 Identify the partition to be updated. This specification is required.