diff -r cc60c8dd7924 -r 5bc2bb8b7946 relpipe-data/roadmap.xml
--- a/relpipe-data/roadmap.xml	Fri Nov 26 22:14:18 2021 +0100
+++ b/relpipe-data/roadmap.xml	Mon Feb 21 00:43:11 2022 +0100
@@ -16,12 +16,19 @@
 			Released versions are described on the <m:a href="download">download</m:a> page.
 		</p>
 		
-		<h2>v0.17, v0.18, v0.19 etc.</h2>
+		<h2>v0.19, v0.20, v0.21 etc.</h2>
 		
 		<p>
 			Releases for discussion and verification of the format and API design.
 		</p>
 		
+		<p>
+			This phase (before v1.0.0) might seem quite long.
+			But it is important to verify the ideas and design in various scenarios, on various use cases.
+			The general idea and the big picture are quite clear and stable.
+			However there are many technical details that need to be carefully tuned.
+		</p>
+		
 		<h3>Data types</h3>
 		<ul>
 			<li>fractions</li>
@@ -59,6 +66,7 @@
 			<li>publish documentation of the stable API and file format</li>
 			<li>publish automated complex tests (specification vs. implementation compliance)</li>
 			<li>verify the format from the performance point of view</li>
+			<li>relpipe-lib-writer: several modes of output buffering (auto, relation, record, value) or manual control</li>
 			<li>improve parsing (corrupted input may currently lead to huge memory allocations), more fuzzing</li>
 			<li>code clean-up  and refactoring, move some reusable parts to common libraries</li>
 			<li>test the build with another compiler and tune the code</li>