Fixed typo in the oscal_ssp_metaschema and updated controversial cons…

…traint for group/part in oscal_catalog_metaschema

src/metaschema/oscal_catalog_metaschema.xml

@@ -146,7 +146,7 @@
                   </allowed-values>
                   <allowed-values target="part[has-oscal-namespace('http://csrc.nist.gov/ns/oscal')]/@name">
                         <enum value="overview">An introduction to a control or a group of controls.</enum>
-                        <enum value="statement">A set of implementation requirements.</enum>
+                        <enum value="instruction">An information providing directions for a control or a group of controls.</enum>
                   </allowed-values>
             </constraint>
             <remarks>
@@ -255,7 +255,7 @@
                         target="part[has-oscal-namespace('http://csrc.nist.gov/ns/oscal')]/@name">
                         <enum value="overview">An introduction to a control or a group of
                               controls.</enum>
-                        <enum value="statement">A set of implementation requirements.</enum>
+                        <enum value="statement">A set of implementation requirements or recommendations.</enum>
                         <enum value="guidance">Additional information to consider when selecting,
                               implementing, assessing, and monitoring a control.</enum>
                         <enum value="example">An example of an implemented requirement or control statement.</enum>

src/metaschema/oscal_ssp_metaschema.xml

@@ -156,7 +156,7 @@
         </enum>
         <enum value="community-cloud">The community cloud deployment model as defined by <a href="https://doi.org/10.6028/NIST.SP.800-145">The NIST Definition of Cloud Computing</a>.
         </enum>
-        <enum value="hybrid-cloud">The hybrid cloud deployment model as defined by as defined by <a href="https://doi.org/10.6028/NIST.SP.800-145">The NIST Definition of Cloud Computing</a>.
+        <enum value="hybrid-cloud">The hybrid cloud deployment model as defined by <a href="https://doi.org/10.6028/NIST.SP.800-145">The NIST Definition of Cloud Computing</a>.
         </enum>
         <!-- TODO: consider generalizing this in a way that applies to other usage contexts. -->
         <enum value="government-only-cloud">A specific type of community-cloud for use only by government services.</enum>