address comments by @elichad

Author: NicolasCARPi

docs/_specification/1.2-DRAFT/appendix/implementation-notes.md

@@ -46,13 +46,13 @@ When implementing tools to work with RO-Crate it is not necessary to use JSON-LD
 
 ## Combining with other packaging schemes
 
-RO-Crates may co-exist with other packaging schemes, such as [BagIt] or [ELN] using two general approaches; either (a) _adding_ RO-Crate into a package as part of the payload or (b) _wrapping_ another kind of package.
+RO-Crates may co-exist with other packaging schemes, such as [BagIt] or [ELN] (Electronic Lab Notebook) using two general approaches; either (a) _adding_ RO-Crate into a package as part of the payload or (b) _wrapping_ another kind of package.
 
 ### ELN examples
 
-An "ELN" archive (with file extension **.eln**, see [IANA assignment](https://www.iana.org/assignments/media-types/application/vnd.eln+zip) and [specification](https://github.com/TheELNConsortium/TheELNFileFormat/blob/master/SPECIFICATION.md)), is a valid RO-Crate packaged in a certain way. It is a ZIP file that contains a folder, and this folder _is_ the RO-Crate and contains the `ro-crate-metadata.json` file. See [Structure of the archive](https://github.com/TheELNConsortium/TheELNFileFormat/blob/master/SPECIFICATION.md#structure-of-the-archive) from the specification.
+An "ELN" archive (with file extension `.eln`, see [IANA assignment](https://www.iana.org/assignments/media-types/application/vnd.eln+zip) and [specification](https://github.com/TheELNConsortium/TheELNFileFormat/blob/master/SPECIFICATION.md)), is a valid RO-Crate packaged in a certain way. It is a ZIP file that contains a folder, and this folder is the _RO-Crate Root_ containing the `ro-crate-metadata.json` file. See [Structure of the archive](https://github.com/TheELNConsortium/TheELNFileFormat/blob/master/SPECIFICATION.md#structure-of-the-archive) from the specification.
 
-As such, when processing a **.eln** file, one needs to extract the ZIP archive, look for the only folder present at root directory of the ZIP archive, and process its content as a normal RO-Crate.
+As such, when processing a `.eln` file, one needs to extract the ZIP archive, look for the only folder present at root directory of the ZIP archive, and process its content as a normal RO-Crate.
 
 ### BagIt examples
 
@@ -190,7 +190,7 @@ reference a downloadable file by relative paths within `data/`, even if
 this file is not itself described in the RO-Crate metadata.
 
 
-#### Snapshots of external files
+##### Snapshots of external files
 
 As an alternative to the above, [web-based data entities](../data-entities#web-based-data-entities)
 can be used in the RO-Crate:
@@ -217,7 +217,7 @@ primarily pointing at a web resource which is allowed to change
 without causing a BagIt checksum error.
 
 
-### Example of wrapping a BagIt bag in an RO-Crate
+#### Example of wrapping a BagIt bag in an RO-Crate
 
 Alternatively, an RO-Crate can _wrap_ a BagIt bag, so that the RO-Crate metadata
 is outside of the bag directory and can be changed without changing the payload's checksums.