Updated Whats new and HED version tutorial

docs/source/HedAnnotationInNWB.md

@@ -1,4 +1,4 @@
-# HED annotation in NWB (draft)
+# HED annotation in NWB
 
 [**Neurodata Without Borders (NWB)**](https://www.nwb.org/) is a data standard for organizing neurophysiology data.
 NWB is used extensively as the data representation for single cell and animal recordings as well as
@@ -22,7 +22,14 @@ The `ndx-hed` extension is not currently supported in MATLAB, although support i
 
 ## NWB ndx-hed installation
 
-Should it be uploaded to PyPi?
+The `ndx-hed` extension for Python can be installed using `pip`:
+
+
+```bash
+pip install -U ndx-hed
+```
+
+The `ndx-hed` extension for MATLAB is under development and not available.
 
 ## NWB ndx-hed examples
 

docs/source/UnderstandingHedVersions.md

@@ -1 +1,70 @@
-# Understanding HED versions (draft)
+# Understanding HED versions
+
+HED (Hierarchical Event Descriptors) schemas are standardized tre-structured vocabularies for annotating experimental data, particularly 
+neuroimaging and behavioral data. 
+The **HED standard schema** contains a base vocabulary of terms that are common to most experiments,
+while various **HED library schemas** contain discipline specific vocabularies.
+The [**HED schema viewer**](https://www.hedtags.org/display_hed.html) allows users to view the available vocabularies.
+
+Applications that use HED must specify which versions of the HED schemas they are using.
+The definitive HED vocabulary files are available in the
+[**hed-schemas](https://github.com/hed-standard/hed-schemas) GitHub repository.
+Tools retrieve the XML files corresponding to the designated HED either from GitHUB or from
+their internal caches to use in validation and analysis.
+
+This tutorial explains HED versioning and how to specify HED version.
+
+## HED version basics
+
+HED uses semantic versioning of the form *Major.Minor.Patch* for the standard schema.
+If referring to a library schema the *library_* is prepended to the version.
+
+When multiple schemas are being used together, you specify the versions as a list of strings.
+
+
+```{list-table} HED version examples
+:header-rows: 1
+:name: hed-version-examples
+
+* - Version
+ - Meaning
+* - *"8.3.0"*
+ - HED standard schema version *8.3.0*
+* - *"score_1.0.0"*
+ - SCORE library schema version *1.0.0*
+* - *"score_1.2.0"*
+ - SCORE library schema version *score_1.2.0*<br/>partnered with standard schema *8.2.0*
+* - *["score_1.2.0", "bc:testlib_4.0.0"]*
+ - SCORE library schema version *score_1.2.0* and *testlib_4.0.0*.
+* - *["score_1.0.0", "ac:8.3.0"]*
+ - SCORE library schema version 1.0.0 and standard schema *8.3.0*.
+* - *["lang_1.0.0", "score_2.0.0"]*
+ - LANG library schema version *lang_1.0.0* and<br/>SCORElibrary schema *score_2.0.0*<br/>both partnered with standard schema *8.3.0*.
+``` 
+
+SCORE library schema version 1.0.0 is an **unpartnered schema**.
+This means that if you want to use any tags from the standard schema you must explicitly give the version.
+Multiple unpartnered schemas must use prefixes for all but one of the schema versions.
+Annotations using tags from schemas whose versions are prefixed must also include the prefix in the tag.
+So if the version specification is *["score_1.0.0", "ac:8.3.0"]*, an annotation using the HED tag `Event`
+must be `ac:Event`.
+
+**Partnered schemas** automatically include a specific version of the standard schema.
+LANG library schema 1.0.0 and SCORE library schema 2.0.0 (both in prerelease)
+are both partnered with standard schema 8.3.0.
+Further, these library schemas have no conflicts with each other.
+Hence, the version specifications *["lang_1.0.0", "score_2.0.0"]* does not require a prefixes.
+All three schemas are loaded as a single schema at runtime.
+
+## Using HED versions
+
+In BIDS (Brain Imaging Data Structure) datasets, the HED version is
+specified in the `dataset_description.json` file at the top level of the dataset.
+See [**7.5. Library schemas in BIDS**](https://hed-specification.readthedocs.io/en/latest/07_Library_schemas.html#library-schemas-in-bids)
+in the HED specification for information about the rules.
+
+In NWB (Neurodata Without Borders) dataset, the HED version is specified
+when `HedTags` objects are created.
+See [**HED annotation in NWB**](https://www.hed-resources.org/en/develop/HedAnnotationInNWB.html)
+for additional information and examples.
+

docs/source/WhatsNew.md

@@ -1,6 +1,10 @@
 (whats-new-anchor)=
 # What's new?
 
+**July 25, 2024**: **ndx-hed 0.1.0 HED extension for NWB released on PyPI.** 
+> Initial support includes the HedTags class extending VectorData. 
+> HedTags objects may be added as columns to any NWB DynamicTable. 
+
 **July 4, 2024**: **HED specification v3.3.0 released.** 
 > [**https://zenodo.org/records/12664745**](https://zenodo.org/records/12664745) 
 > Includes lazy partnering and HED ontology formats.