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-rw-r--r--README7
1 files changed, 5 insertions, 2 deletions
diff --git a/README b/README
index 12fd4152..4c0be19d 100644
--- a/README
+++ b/README
@@ -133,8 +133,11 @@ For systems, use the following fields:
* `disk-size`: size of the disk image to be created; may use suffixes like
`M` and `G`; **required**
-* `strata`: a list of stratum names to include in the system image;
- **required**
+* `strata`: a list of triples specifying strata to be included in the system
+ image. Similar to chunks, you should give `repo`, `ref` and `morph`
+ (filename without the .morph extension) for each stratum. The value of
+ the `morph` field will be taken as the artifact name; if this causes
+ ambiguity then an `alias` may be specified as well. **required**
Example chunk (simplified commands):