a couple more small changes

schema/geoblacklight-schema.md

@@ -99,7 +99,7 @@ This is an overview of the GeoBlacklight Metadata Schema, Version 1.0. For more
 | uri							| `layer_slug_s`|
 | Required						| yes|
 | Type							| string|
-| Description					| This is a string appended to the base URL of a GeoBlacklight installation to create a unique landing page for each resource. It is visible to the user and is used for Permalinks|
+| Description					| This is a string appended to the base URL of a GeoBlacklight installation to create a unique landing page for each resource. It is visible to the user and serves the purpose of forming a persistent URL for each catalog item.|
 | Entry Guidelines				| This string must be a globally unique value. The value should be alpha-numeric characters separated by dashes.|
 | Controlled Vocabulary			| no|
 | Element Set					| GeoBlacklight|

schema/schema-commentary.md

@@ -174,10 +174,8 @@ hidden field is recommended.
 
 ### Temporal Coverage
 
-Temporal Coverage can indicate the time period the resource depicts, when the
-data was collected, and/or when the resources was created. It is a
-multivalued string field that can accommodate various characters that
-clarify the time period. Examples: “1910?”, “1800-1805”, “before 2000”.
+The `dct_temporal_sm` field is multi-valued, so multiple strings can be used to indicate the time period the resource depicts, when the
+data was collected, and/or when the resources was created. Examples include: “1910?”, “1800-1805”, “before 2000”. If a single dataset spans multiple years, one can add each intervening year as a discrete value (e.g., 2007,2008,2009,2010). However, a common convention is to include only the first and last year (e.g., 2007,2010 for a dataset encompassing the span of time between 2007 and 2010).
 
 ###  Geometry Type