Update README.md

README.md

 # Workload Manager
 
-
-
-## Hints
-
-### When to Use
-- Single fast analysis step (eg your analysis file runs for only a minute)
+## When to Use
+If at least one condition is met, then the use is recommended:
+- Single fast analysis step (eg your single analysis runs for only a minute)
 - 1000's or more single analysis steps
-- Usage of all cores in node exclusive partitions (Mogon 2, not on HIMster 2)
+- Easy usage of all cores in node exclusive partitions (true for Mogon 2, such partitions do not exist on HIMster 2)
 
 
-### Comparision
-
+### Comparision with SLURM
 - Queue based work distribution, equal work distribution (in contrast to SLURM multiprog or [staskfarm](https://github.com/cmeesters/staskfarm) from [MogonWiki Node local scheduling](https://mogonwiki.zdv.uni-mainz.de/dokuwiki/node_local_scheduling))
 - Usage of MPI: 
   - large connected jobs (>200 cores) are preferred by the job manager
@@ -38,7 +34,7 @@ execname | required | (positional argument) name of executable to call OR comple
 -h, --help | optional | show this help message and exit
 -v, --verbosity | optional | increase output verbosity
 -V, --version | optional | Returns the actual program version
--d DELAY, --delay DELAY | optional | time delay in ms between starts of consecutive jobs to help distributing load
+-d DELAY, --delay DELAY | optional | time delay in ms between starts of consecutive jobs to help distributing load on the cluster
 -a [ARG_VARIABLE], --arg-variable [ARG_VARIABLE] | optional | add variables to use as execname argument. example: `-a theta,0,180,2.5 -a energy,0,10`
 -i INPUT_DIR, --input-dir INPUT_DIR | optional | specifies the directory with files to process
 -o OUTPUT_DIR, --output-dir OUTPUT_DIR | optional | output directory, default = output[datetime]
@@ -46,6 +42,22 @@ execname | required | (positional argument) name of executable to call OR comple
 -ni, --no-inputfiles | optional | set this flag if no iteration over input files requested.
 -n, --dry-run | optional | Do not launch workers, just build test settings.
 
+#### Placeholders
+
+Name of Placeholder | Description
+--- | ---
+{execname} | Execname provided in the arguments. Consists only of the first word, of multiple statements are given
+{inputdir} | Input directory provided in the arguments, default is "./"
+{jobid} | Internal enumeration of jobs
+{outputdir} | root outputdir of jobs. Each job creates a subdirectory with its job number and writes its subdirectory
+{inputfilename} | Name of the input file to process. Value changes for each job.
+{VarName} | Each variable given with a `-a VarName,...` statement is available as a placeholder
+
+- Default Placeholderstring: 
+  - normal: ` {VarName0} {VarName1} ... {VarNameN} {inputdir}{inputfilename} {outputdir}{jobid}/outfile.txt`
+  - with `-ni`-option: ` {VarName0} {VarName1} ... {VarNameN} {outputdir}{jobid}/outfile.txt`
+  - with `-s`-option OR execname containing minimum one `{`-character: ` ` (= empty)
+
 
 ### First steps (aka hello world)