diff --git a/grobid-core/src/main/java/org/grobid/core/document/TEIFormatter.java b/grobid-core/src/main/java/org/grobid/core/document/TEIFormatter.java
index d9f2c46006..8f9c12aad1 100755
--- a/grobid-core/src/main/java/org/grobid/core/document/TEIFormatter.java
+++ b/grobid-core/src/main/java/org/grobid/core/document/TEIFormatter.java
@@ -923,8 +923,8 @@ else if (biblio.getE_Year().length() == 4)
             tei.append("\t\t\t<abstract>\n");
         }
 
-        if ((abstractText != null) && (abstractText.length() != 0)) {
-            if ( (biblio.getLabeledAbstract() != null) && (biblio.getLabeledAbstract().length() > 0) ) {
+        if (StringUtils.isNotBlank(abstractText)) {
+            if (StringUtils.isNotBlank(biblio.getLabeledAbstract())) {
                 // we have available structured abstract, which can be serialized as a full text "piece"
                 StringBuilder buffer = new StringBuilder();
                 try {
diff --git a/grobid-home/pdfalto/languages/xpdf-others/fitted.nameToUnicode b/grobid-home/pdfalto/languages/xpdf-others/fitted.nameToUnicode
new file mode 100644
index 0000000000..9aba076d9f
--- /dev/null
+++ b/grobid-home/pdfalto/languages/xpdf-others/fitted.nameToUnicode
@@ -0,0 +1,7 @@
+0030 zero.fitted
+0031 one.fitted
+0032 two.fitted
+0033 three.fitted
+0034 four.fitted
+0035 five.fitted
+0036 six.fitted
\ No newline at end of file
diff --git a/grobid-home/pdfalto/languages/xpdf-others/ligatures.nameToUnicode b/grobid-home/pdfalto/languages/xpdf-others/ligatures.nameToUnicode
new file mode 100644
index 0000000000..831b07c8ff
--- /dev/null
+++ b/grobid-home/pdfalto/languages/xpdf-others/ligatures.nameToUnicode
@@ -0,0 +1,6 @@
+fb00 f_f
+fb01 f_i
+fb02 f_l
+fb03 f_f_i
+
+
diff --git a/grobid-home/pdfalto/languages/xpdf-others/oldstyle.nameToUnicode b/grobid-home/pdfalto/languages/xpdf-others/oldstyle.nameToUnicode
new file mode 100644
index 0000000000..7af14c9a80
--- /dev/null
+++ b/grobid-home/pdfalto/languages/xpdf-others/oldstyle.nameToUnicode
@@ -0,0 +1,10 @@
+0030 zero.oldstyle
+0031 one.oldstyle
+0032 two.oldstyle
+0033 three.oldstyle
+0034 four.oldstyle
+0035 five.oldstyle
+0036 six.oldstyle
+0037 seven.oldstyle
+0038 eight.oldstyle
+0039 nine.oldstyle
\ No newline at end of file
diff --git a/grobid-home/pdfalto/languages/xpdf-others/others.nameToUnicode b/grobid-home/pdfalto/languages/xpdf-others/others.nameToUnicode
new file mode 100644
index 0000000000..9851bb556c
--- /dev/null
+++ b/grobid-home/pdfalto/languages/xpdf-others/others.nameToUnicode
@@ -0,0 +1,4 @@
+2113 lscript
+2202 partialdiff
+21A9 arrowhookleft
+21A9 arrowrighttophalf
\ No newline at end of file
diff --git a/grobid-home/pdfalto/languages/xpdf-others/sc.nameToUnicode b/grobid-home/pdfalto/languages/xpdf-others/sc.nameToUnicode
new file mode 100644
index 0000000000..8418b37b30
--- /dev/null
+++ b/grobid-home/pdfalto/languages/xpdf-others/sc.nameToUnicode
@@ -0,0 +1,26 @@
+0061 a.sc
+0062 b.sc
+0063 c.sc
+0064 d.sc
+0065 e.sc
+0066 f.sc
+0067 g.sc
+0068 h.sc
+0069 i.sc
+006a j.sc
+006c l.sc
+006d m.sc
+006e n.sc
+006f o.sc
+0070 p.sc
+0071 q.sc
+0072 r.sc
+0073 s.sc
+0074 t.sc
+0075 u.sc
+0076 v.sc
+0077 w.sc
+0078 x.sc
+0079 y.sc
+007a z.sc
+002d hyphen.sc
\ No newline at end of file
diff --git a/grobid-home/pdfalto/languages/xpdf-others/taboldstyle.nameToUnicode b/grobid-home/pdfalto/languages/xpdf-others/taboldstyle.nameToUnicode
new file mode 100644
index 0000000000..1093439560
--- /dev/null
+++ b/grobid-home/pdfalto/languages/xpdf-others/taboldstyle.nameToUnicode
@@ -0,0 +1,10 @@
+0030 zero.taboldstyle
+0031 one.taboldstyle
+0032 two.taboldstyle
+0033 three.taboldstyle
+0034 four.taboldstyle
+0035 five.taboldstyle
+0036 six.taboldstyle
+0037 seven.taboldstyle
+0038 eight.taboldstyle
+0039 nine.taboldstyle
\ No newline at end of file
diff --git a/grobid-home/pdfalto/languages/xpdfrc b/grobid-home/pdfalto/languages/xpdfrc
index 895c5debed..be909550ca 100644
--- a/grobid-home/pdfalto/languages/xpdfrc
+++ b/grobid-home/pdfalto/languages/xpdfrc
@@ -59,3 +59,11 @@ unicodeMap	TIS-620		languages/xpdf-thai/TIS-620.unicodeMap
 #----- begin Turkish support package (2011-aug-15)
 unicodeMap	ISO-8859-9	languages/xpdf-turkish/ISO-8859-9.unicodeMap
 #----- end Turkish support package
+#----- begin oldstyle support package (2024-dec-31)
+nameToUnicode      languages/xpdf-others/oldstyle.nameToUnicode
+nameToUnicode      languages/xpdf-others/taboldstyle.nameToUnicode
+nameToUnicode      languages/xpdf-others/ligatures.nameToUnicode
+nameToUnicode      languages/xpdf-others/fitted.nameToUnicode
+nameToUnicode      languages/xpdf-others/others.nameToUnicode
+nameToUnicode      languages/xpdf-others/sc.nameToUnicode
+#----- end oldstyle support package
diff --git a/grobid-home/pdfalto/lin-64/xpdfrc b/grobid-home/pdfalto/lin-64/xpdfrc
index 5b909e6b33..6c997423ea 100644
--- a/grobid-home/pdfalto/lin-64/xpdfrc
+++ b/grobid-home/pdfalto/lin-64/xpdfrc
@@ -59,3 +59,12 @@ unicodeMap	TIS-620		../languages/xpdf-thai/TIS-620.unicodeMap
 #----- begin Turkish support package (2011-aug-15)
 unicodeMap	ISO-8859-9	../languages/xpdf-turkish/ISO-8859-9.unicodeMap
 #----- end Turkish support package
+#----- begin oldstyle support package (2024-dec-31)
+nameToUnicode      ../languages/xpdf-others/oldstyle.nameToUnicode
+nameToUnicode      ../languages/xpdf-others/taboldstyle.nameToUnicode
+nameToUnicode      ../languages/xpdf-others/ligatures.nameToUnicode
+nameToUnicode      ../languages/xpdf-others/fitted.nameToUnicode
+nameToUnicode      ../languages/xpdf-others/others.nameToUnicode
+nameToUnicode      ../languages/xpdf-others/sc.nameToUnicode
+#----- end oldstyle support package
+
diff --git a/grobid-home/pdfalto/mac-64/xpdfrc b/grobid-home/pdfalto/mac-64/xpdfrc
index 5b909e6b33..e0dc52b508 100644
--- a/grobid-home/pdfalto/mac-64/xpdfrc
+++ b/grobid-home/pdfalto/mac-64/xpdfrc
@@ -59,3 +59,11 @@ unicodeMap	TIS-620		../languages/xpdf-thai/TIS-620.unicodeMap
 #----- begin Turkish support package (2011-aug-15)
 unicodeMap	ISO-8859-9	../languages/xpdf-turkish/ISO-8859-9.unicodeMap
 #----- end Turkish support package
+#----- begin oldstyle support package (2024-dec-31)
+nameToUnicode      ../languages/xpdf-others/oldstyle.nameToUnicode
+nameToUnicode      ../languages/xpdf-others/taboldstyle.nameToUnicode
+nameToUnicode      ../languages/xpdf-others/ligatures.nameToUnicode
+nameToUnicode      ../languages/xpdf-others/fitted.nameToUnicode
+nameToUnicode      ../languages/xpdf-others/others.nameToUnicode
+nameToUnicode      ../languages/xpdf-others/sc.nameToUnicode
+#----- end oldstyle support package
diff --git a/grobid-home/pdfalto/mac_arm-64/xpdfrc b/grobid-home/pdfalto/mac_arm-64/xpdfrc
index 5b909e6b33..e0dc52b508 100644
--- a/grobid-home/pdfalto/mac_arm-64/xpdfrc
+++ b/grobid-home/pdfalto/mac_arm-64/xpdfrc
@@ -59,3 +59,11 @@ unicodeMap	TIS-620		../languages/xpdf-thai/TIS-620.unicodeMap
 #----- begin Turkish support package (2011-aug-15)
 unicodeMap	ISO-8859-9	../languages/xpdf-turkish/ISO-8859-9.unicodeMap
 #----- end Turkish support package
+#----- begin oldstyle support package (2024-dec-31)
+nameToUnicode      ../languages/xpdf-others/oldstyle.nameToUnicode
+nameToUnicode      ../languages/xpdf-others/taboldstyle.nameToUnicode
+nameToUnicode      ../languages/xpdf-others/ligatures.nameToUnicode
+nameToUnicode      ../languages/xpdf-others/fitted.nameToUnicode
+nameToUnicode      ../languages/xpdf-others/others.nameToUnicode
+nameToUnicode      ../languages/xpdf-others/sc.nameToUnicode
+#----- end oldstyle support package