update README.md

Author: mlin

README.md

@@ -1,13 +1,17 @@
 # Genomics Extension for SQLite
 
-![build](https://github.com/mlin/GenomicSQLite/workflows/build/badge.svg?branch=main)
+**("GenomicSQLite")**
 
-(**GenomicSQLite** for short!) Adds to the [ubiquitous](https://www.sqlite.org/mostdeployed.html) embedded RDBMS:
+This [SQLite3 loadable extension](https://www.sqlite.org/loadext.html) adds features to the [ubiquitous](https://www.sqlite.org/mostdeployed.html) embedded RDBMS supporting applications in genome bioinformatics:
 
 * genomic range indexing for overlap queries & joins
-* streaming storage compression using [Zstandard](https://facebook.github.io/zstd/) (also available [standalone](https://github.com/mlin/sqlite_zstd_vfs))
-* pre-tuned settings for "omics" scale datasets
+* streaming storage compression (also available [standalone](https://github.com/mlin/sqlite_zstd_vfs))
+* pre-tuned settings for "big data"
+
+Notice: this project is not associated with the SQLite developers.
 
-Together, these make SQLite a [viable file format](https://www.sqlite.org/appfileformat.html) for storage, transport, and basic analysis of genomic data.
+## Under construction
+
+![build](https://github.com/mlin/GenomicSQLite/workflows/build/badge.svg?branch=main)
 
-Notice: this project is *not* associated with the SQLite developers.
+The extension isn't quite ready for general use. The repo is public to facilitate "soft launch" preparations.

loaders/README.md

@@ -1,8 +1,8 @@
 # GenomicSQLite example loaders
 
-These programs exemplify loading common genomics formats into SQLite databases, with the Genomics Extension providing compression and genomic range indexing. They're used in the extension's test suite, and may perhaps become useful for new applications. Improvement/addition pull requests welcome!
+These programs exemplify loading common genomics formats into SQLite databases, with the Genomics Extension providing compression and genomic range indexing. They're used in the extension's test suite, and may perhaps become useful for new applications. Pull requests welcome!
 
-* `vcf_into_sqlite:`: loads VCF/gVCF/pVCF into a highly detailed schema representing all fields in SQL columns.
+* `vcf_into_sqlite:`: loads VCF/gVCF/pVCF into an exhaustively detailed schema, representing all fields in SQL columns.
 * `vcf_lines_into_sqlite`: more simply loads VCF with each text line stored alongside bare-essential genomic range columns for indexing.
 * `sam_into_sqlite`: loads SAM/BAM/CRAM with a main table for the alignment details and cross-referenced tables for QNAME, SEQ, QUAL, & tags.
 

loaders/vcf_into_sqlite.cc

@@ -1,6 +1,6 @@
 /*
- * vcf_into_sqlite: load VCF/gVCF/pVCF into a GenomicSQLite database with a detailed schema
- * unpacking genotypes and all QC fields
+ * vcf_into_sqlite: load VCF/gVCF/pVCF into a GenomicSQLite database with an exhaustively detailed
+ * schema, representing all fields in SQL columns.
  * - if there are individual genotypes:
  *   - they & FORMAT fields go into a separate table keyed by (variant,sample)
  *   - sample names go into a dimension table referred to by integer ID elsewhere