diff --git a/quick-reference.markdown b/quick-reference.markdown
index cf14250..2c528df 100644
--- a/quick-reference.markdown
+++ b/quick-reference.markdown
@@ -345,6 +345,32 @@
 |                       | `leftarrow`                       |                                   |
 |                       | `leftwards-arrow`                 |                                   |
 
+### Relational algebra (`relational-algebra.xml`)
+
+| Item                  | Element(s)                | Attributes                        | Notes
+| ----                  | ----------                | ----------                        | -----
+| project operator (π)  | `project`                 |                                   | U+03C0 GREEK SMALL LETTER PI
+|                       | `project-operator`        |                                   |
+|                       | `relational-project`      |                                   |
+| extend operator (ε)   | `extend`                  |                                   | U+03B5 GREEK SMALL LETTER EPSILON
+|                       | `extend-operator`         |                                   |
+|                       | `relational-extend`       |                                   |
+| rename operator (ρ)   | `relational-rename`       |                                   | U+03C1 GREEK SMALL LETTER RHO
+|                       | `rename`                  |                                   |
+|                       | `rename-operator`         |                                   |
+| restrict operator (σ) | `restrict`                |                                   | U+03C2 GREEK SMALL LETTER SIGMA
+|                       | `restrict-operator`       |                                   |
+|                       | `relational-restrict`     |                                   |
+| join operator (⋈)     | `bowtie`                  |                                   | U+22C8 BOWTIE
+|                       | `inner-join`              |                                   | (or U+2A1D JOIN)
+|                       | `join`                    |                                   |
+|                       | `join-operator`           |                                   |
+|                       | `natural-join`            |                                   |
+|                       | `relational-join`         |                                   |
+| outer join operator   | `outer-join`              | `[type=`**`full`**`|left|right]`  | U+27D5 LEFT OUTER JOIN
+|                       | `outer-join-operator`     |                                   | U+27D6 RIGHT OUTER JOIN
+|                       | `relational-outer-join`   |                                   | U+27D7 FULL OUTER JOIN
+
 ### Greek (`greek-characters.xml`)
 
 | Item                  | Element(s)        | Attributes    | Notes
@@ -614,12 +640,6 @@
 modules/quotations.xml: <template name="nested-double-quote" match="quote//quote">
 modules/quotations.xml: <template name="nested-single-quote" match="quote[@single='yes']//quote" priority="2">
 modules/quotations.xml: <template name="quotation" match="quotation">
-modules/relational-algebra.xml: <template name="project-operator" match="project|project-operator|relational-project">
-modules/relational-algebra.xml: <template name="extend-operator" match="extend|extend-operator|relational-extend">
-modules/relational-algebra.xml: <template name="rename-operator" match="rename|rename-operator|relational-rename">
-modules/relational-algebra.xml: <template name="restrict-operator" match="restrict|restrict-operator|relational-restrict">
-modules/relational-algebra.xml: <template name="join-operator" match="join-operator|join|natural-join|inner-join|bowtie|relational-join">
-modules/relational-algebra.xml: <template name="outer-join-operator" match="outer-join-operator|outer-join|relational-outer-join">
 modules/tabular.xml:    <template name="tabular" match="tabular">
 modules/tabular.xml:    <template name="aligned-tabular-column" match="tabular-columns/column[@align]">
 modules/tabular.xml:    <template name="unaligned-tabular-column" match="tabular-columns/column[not(@align)]">