\n MESH module allows you to work with <b>Quadratic Elements</b>.
-Quadratic Edge is not a straight but a broken line and can be defined
-by three points: first, middle and last. All more complex \b Quadratic
-\b Elements differ from ordinary ones in that they consist of Quadratic
-Edges.
+Quadratic elements are defined by the same corner nodes as the
+corresponding linear ones, but in addition they have \a midside nodes
+located between the corner nodes on element sides.
+
+If a quadratic quadrilateral element has an additional node at the
+element center, it is a bi-quadratic element (or
+QUAD9). If a quadratic hexahedral element has 7 additional nodes:
+at the element center and at the center of each side, it is a
+tri-quadratic element (or HEXA27).
+
+The convention of nodal connectivity of elements used in SALOME is
+the MED library convention. You can consult the description of nodal
+connectivity of elements in the documentation on MED library or
+<a href="http://www.code-aster.org/outils/med/html/connectivites.html">
+ here </a>.
+
+There are several ways to create quadratic elements in your mesh:
+- manually (this way is described below);
+- use \ref quadratic_mesh_anchor "Quadratic Mesh" hypothesis to
+generate a quadratic mesh on your geometry;
+- convert an existing linear mesh to a quadratic one
+(see \ref convert_to_from_quadratic_mesh_page).
<em>To add a quadratic element to your mesh:</em>
<ol>
