diff --git a/VCFv4.2.tex b/VCFv4.2.tex
index 01e40bc98..2469d7830 100644
--- a/VCFv4.2.tex
+++ b/VCFv4.2.tex
@@ -141,9 +141,12 @@ \subsubsection{Sample field format}
 It is possible to define sample to genome mappings as shown below:
 \small
 \begin{verbatim}
-##SAMPLE=<ID=S_ID,Genomes=G1_ID;G2_ID; ...;GK_ID,Mixture=N1;N2; ...;NK,Description=S1;S2; ...;SK>
+##SAMPLE=<ID=S_ID,FILTER=PASS,Genomes=G1_ID;G2_ID; ...;GK_ID,Mixture=N1;N2; ...;NK,Description=S1;S2; ...;SK>
 \end{verbatim}
 \normalsize
+ID is a string that identifies the sample. It comprises of non-whitespace characters and doesn't include the comma (`,') character.
+FILTER is a string that has been defined in a \verb!##FILTER! line, except for PASS or `.' which mean that the sample passes or that the filter is missing (respectively).
+
 \subsubsection{Pedigree field format}
 It is possible to record relationships between genomes using the following syntax:
 \begin{verbatim}
diff --git a/VCFv4.3.tex b/VCFv4.3.tex
index e9e2c7301..8e7ce61ab 100644
--- a/VCFv4.3.tex
+++ b/VCFv4.3.tex
@@ -240,6 +240,13 @@ \subsubsection{Sample field format}
 ##SAMPLE=<ID=Sample2,Assay=Exome,Ethnicity=CEU,Disease=Cancer,Tissue=Breast,Description="European patient exome from breast cancer">
 \end{verbatim}}
 
+In the \verb!SAMPLE! line:
+\begin{itemize}
+\item{ID} is a string that identifies the sample. 
+It comprises non-whitespace characters and doesn't include the comma (`.') character.
+\item{FILTER} is a string that has been defined in a \verb!##FILTER! line, except for PASS or `.' which mean that the sample passes or that the filter is missing (respectively).
+\end{itemize}
+
 \subsubsection{Pedigree field format}
 It is possible to record relationships between genomes using the following syntax:
 \begin{verbatim}