diff --git a/doc/MANGO.tex b/doc/MANGO.tex
index d70b308..6eceaad 100644
--- a/doc/MANGO.tex
+++ b/doc/MANGO.tex
@@ -66,7 +66,7 @@
 in an interoperable way.
 It takes into account the huge diversity of source data in terms of feature description, format and usage.
 The MANGO model deals with catalog entries, corresponding to astronomical sources or detections
-of those and represent them as a MANGO Object class.  
+of those and represents them as a MANGO Object class.  
 It attaches identifiers on the "MANGO object" class and associates to each one a flexible 
 set of properties (e.g. observed physical quantities).
 It also offers to link other information like detection status, quality annotation, preview images, etc.
@@ -122,7 +122,7 @@ \section{Introduction}
 individual quantities (positions, velocity, fluxes, magnitudes…).
 None of these proposals has come to completion due to the complexity of the task.
 
-The source DM issue resurfaced at the spring 2018 Interop in Victoria during an hands-on session
+The source DM issue resurfaced at the spring 2018 Interop in Victoria during a hands-on session
 focusing on the tools available to work with VO data models and especially with VO-DML.
 The goal of this session was to annotate astronomical data from different origins in order to make them
 interoperable with each other. The main concern expressed during this session was not much related to the tools themselves but indeed to the lack of models representing sources.
@@ -286,7 +286,7 @@ \subsection{Properties}
  \hline
  \texttt{Label} & Attach semantics to text label & Object name \\
  \hline
- \texttt{PhysicalProperty} & Hook for \texttt{Measure} classes & Model a columns as a time stamp \\
+ \texttt{PhysicalProperty} & Hook for \texttt{Measure} classes & Model a column as a time stamp \\
  \hline
  \texttt{Footprint} & String serialization of shapes & Sky Coverage of a dust cloud \\
  \hline
@@ -294,7 +294,7 @@ \subsection{Properties}
  \hline
  \texttt{Brightness} & Flux or Magnitude & Object magnitude along with photometric calibration.  \\ 
  \hline
- \texttt{Color} & Hardness ratio or magnitude ratio & XMM-Newton hardness ratio, along with descriptions of the related energy bands. \\ [1ex] 
+ \texttt{Color} & Hardness ratio or magnitude difference & XMM-Newton hardness ratio, along with descriptions of the related energy bands. \\ [1ex] 
  \hline
  \texttt{DataLink} & Flat representation of DataLink responses & Links to associated data given as column values\\ [1ex] 
  \hline